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  • 1 answers

Malika Sharma 4 years, 1 month ago (12274058)

ਉਹਦੇ ਘਰ ਵੀ ਨਹੀਂ ਦਿੱਤੇ
  • 0 answers
  • 0 answers
  • 1 answers

Banke Bihari 4 years, 1 month ago (12321037)

The ability of an individual to perform efficiently in his or her sports
  • 4 answers

Jaiditya Sinha 4 years, 1 month ago (12161615)

2√2

Sandhya Prajapati😘😘 4 years, 2 months ago (12108029)

3

Dhatri Garg 4 years, 2 months ago (12192701)

If x^2 is 2 then x= sqrt2 then x^3 = (sqrt2)^3= 2sqrt2

Krish Chaurasiya 4 years, 2 months ago (10293071)

X3
  • 5 answers

Bhavya Mahadevaswamy 4 years, 1 month ago (12407911)

81,536

Shreya Maurya 4 years, 1 month ago (12281019)

81536

Yuvraj Singh 4 years, 2 months ago (7144609)

81536

Aniket Gupta 4 years, 2 months ago (11890327)

81,536

Pari Sharma Sharma 4 years, 2 months ago (12190598)

81,536
http://mycbseguide.com/examin8/
  • 5 answers

Yashi Gupta 4 years, 1 month ago (12365924)

Thanks

Miss Akshita Singh Parihar 4 years, 1 month ago (11056767)

जमाल सहाब ने कहा कि तुम्हे पोशाक के बारे में बताने की क्या जरूरत क्या थी

Aditya Singh 4 years, 1 month ago (11895072)

Aise golmol jawab se kuchh Nahin hoga janab

Devang Singh Singh 4 years, 2 months ago (11777337)

Pagal

Vaibhav Srivastva 4 years, 2 months ago (12191948)

Please give ans
  • 1 answers

Mansi Chauhan 4 years, 2 months ago (12054950)

Mam I ask you one question
  • 5 answers

Arpit Yadav 4 years, 1 month ago (2366319)

Bonne nuiť

Kale Tushar Vijay Kale 4 years, 1 month ago (12291937)

Bonjour

Anshika Dua 4 years, 1 month ago (11717910)

Bonjour ,

Mounika Ghosh 4 years, 2 months ago (11916300)

Bonjour

Kavya Kaushik 4 years, 2 months ago (12191680)

If u have to say hello so u will say BONJOUR
  • 1 answers

Nigam Nitish 3 years, 4 months ago (13332602)

X y plane is known as argand plane, complex plane.
  • 4 answers

Palak Gaur 4 years, 2 months ago (12131181)

There are infinite no. Between 3/4 and 4/5 ... And one of them can be 0.775

Neelu Idrisi 4 years, 2 months ago (12193623)

What's question term first examination

Himani Sinha 4 years, 2 months ago (12015949)

31/40

Jatin Kushwaha 4 years, 2 months ago (9709723)

19/25
  • 0 answers
  • 2 answers

Navneet Singh 4 years, 2 months ago (12057818)

I am Navneet Singh

Atharv Yelmar 4 years, 2 months ago (12179799)

The pune is a box
  • 1 answers

Kavya Chanana 4 years, 1 month ago (10784349)

Business ethic refer to rule which are to follow while doing business
  • 2 answers

Khushee Bhogayta 4 years, 2 months ago (11012643)

Androneda

Akshdeep Verma 4 years, 2 months ago (10047951)

Andromeda Galaxy
  • 3 answers

Aman Kaur 4 years, 1 month ago (12072542)

Thanku @Arishi Sareen

Arushi Sareen 4 years, 2 months ago (11976623)

Elasticity of supply is ∆Q/∆P so if elasticity is 1 (unitary).. ∆Q=∆P and since change in price is 10% , change in quantity would also be 10%

Arushi Sareen 4 years, 2 months ago (11976623)

It will be 10%
  • 5 answers

Sandhya Prajapati😘😘 4 years, 2 months ago (12108029)

8

Kanchan Sharma 4 years, 2 months ago (12187131)

7

Ʀɪᴛɪᴋ ᴊʜᴀ 4 years, 2 months ago (12139884)

29 states

Anika Kanade 4 years, 2 months ago (4672019)

28 states, 8 union territories

Harshit Kumar 4 years, 2 months ago (12148635)

7
  • 1 answers

Oyin Tasing 4 years, 2 months ago (12200832)

Which of the following statement is NOT substantiated by any information from the passage
  • 1 answers

Arti Sharma 4 years, 1 month ago (12247807)

Why does Mithu enjoy himself thoroughly
  • 0 answers
  • 0 answers
  • 1 answers

Abha Mahant 4 years, 2 months ago (11875740)

Multiple Choice Questions 1. A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power (a) + 0.5 D (b) – 0.5 D (c) + 0.2 D (d) – 0.2 D 2. A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct? (a) The near point of his eyes has receded away (b) The near point of his eyes has come closer to him (c) The far point of his eyes has come closer to him (d) The far point of his eyes has receded away 4. At noon the sun appears white as (a) light is least scattered (b) all the colours of the white light are scattered away (c) blue colour is scattered the most (d) red colour is scattered the most 5. Which of the following phenomena of light are involved in the formation of a rainbow? (a) Reflection, refraction and dispersion (b) Refraction, dispersion and total internal reflection (c) Refraction, dispersion and internal reflection (d) Dispersion, scattering and total internal reflection 6. Twinkling of stars is due to atmospheric (a) dispersion of light by water droplets (b) refraction of light by different layers of varying refractive indices (c) scattering of light by dust particles (d) internal reflection of light by clouds 7. The clear sky appears blue because (a) blue light gets absorbed in the atmosphere (b) ultraviolet radiations are absorbed in the atmosphere (c) violet and blue lights get scattered more than lights of all other colours by the atmosphere (d) light of all other colours is scattered more than the violet and blue colour lights by the atmosphere 8. Which of the following statements is correct regarding the propagation of light of different colours of white light in air? (a) Red light moves fastest (b) Blue light moves faster than green light (c) All the colours of the white light move with the same speed (d) Yellow light moves with the mean speed as that of the red and the violet light 9. The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light (a) is scattered the most by smoke or fog (b) is scattered the least by smoke or fog (c) is absorbed the most by smoke or fog (d) moves fastest in ai [22/10, 10:30 pm] Abha Mahant: 10. Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset? (a) Dispersion of light (b) Scattering of light (c) Total internal reflection of light (d) Reflection of light from the earth 11. The bluish colour of water in deep sea is due to (a) the presence of algae and other plants found in water (b) reflection of sky in water (c) scattering of light (d) absorption of light by the sea 12. When light rays enter the eye, most of the refraction occurs at the (a) crystalline lens (b) outer surface of the cornea (c) iris (d) pupil 13. The focal length of the eye lens increases when eye muscles (a) are relaxed and lens becomes thinner (b) contract and lens becomes thicker (c) are relaxed and lens becomes thicker (d) contract and lens becomes thinner 14. Which of the following statement is correct? (a) A person with myopia can see distant objects clearly (b) A person with hypermetropia can see nearby objects clearly (c) A person with myopia can see nearby objects clearly (d) A person with hypermetropia cannot see distant objects clearly Multiple Choice Questions 1. Which of the following is not a physical change? (a) Boiling of water to give water vapour (b) Melting of ice to give water (c) Dissolution of salt in water (d) Combustion of Liquefied Petroleum Gas (LPG) 2. The following reaction is an example of a 4NH3 (g) + 5O2 (g) → 4NO(g) + 6H2O(g) (i) displacement reaction (ii) combination reaction (iii) redox reaction (iv) neutralisation reaction (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv) 3. Which of the following statements about the given reaction are correct? 3Fe(s) + 4H2O(g) → Fe3O4 (s) + 4H2 (g) (i) Iron metal is getting oxidised (ii) Water is getting reduced (iii) Water is acting as reducing agent (iv) Water is acting as oxidising agent (a) (i), (ii) and (iii) (b) (iii) and (iv) (c) (i), (ii) and (iv) (d) (ii) and (iv) 4. Which of the following are exothermic processes? (i) Reaction of water with quick lime (ii) Dilution of an acid (iii) Evaporation of water (iv) Sublimation of camphor (crystals) (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (iii) and (iv) 5. Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is(are) correct? (i) In beakers A and B, exothermic process has occurred. (ii) In beakers A and B, endothermic process has occurred. (iii) In beaker C exothermic process has occurred. (iv) In beaker C endothermic process has occurred. (a) (i) only (b) (ii) only (c) (i) and (iv) (d) (ii) and (iii) 6. A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation? (a) KMnO4 is an oxidising agent, it oxidises FeSO4 (b) FeSO4 acts as an oxidising agent and oxidises KMnO4 (c) The colour disappears due to dilution; no reaction is involved (d) KMnO4 is an unstable compound and decomposes in presence of FeSO4 to a colourless compound. 7. Which among the following is(are) double displacement reaction(s)? (i) Pb + CuCl2 → PbCl2 + Cu (ii) Na2 SO4 + BaCl2 → BaSO4 + 2NaCl (iii) C + O2 → CO2 (iv) CH4 + 2O2 → CO2 + 2H2O (a) (i) and (iv) (b) (ii) only (c) (i) and (ii) (d) (iii) and (iv) 8. Which among the following statement(s) is(are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to (i) the formation of silver by decomposition of silver chloride (ii) sublimation of silver chloride (iii) decomposition of chlorine gas from silver chloride (iv) oxidation of silver chloride (a) (i) only (b) (i) and (iii) (c) (ii) and (iii) (d) (iv) only 9. Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed? (i) It is an endothermic reaction (ii) It is an exothermic reaction (iii) The pH of the resulting solution will be more than seven (iv) The pH of the resulting solution will be less than seven (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (iii) and (iv) 10. Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved? (i) Displacement reaction (ii) Precipitation reaction (iii) Combination reaction (iv) Double displacement reaction (a) (i) only (b) (ii) only (c) (iv) only (d) (ii) and (iv) 11. Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is (a) 1:1 (b) 2:1 (c) 4:1 (d) 1:2 12. Which of the following is(are) an endothermic process(es)? (i) Dilution of sulphuric acid (ii) Sublimation of dry ice (iii) Condensation of water vapours (iv) Evaporation of water (a) (i) and (iii) (b) (ii) only (c) (iii) only (d) (ii) and (iv) 13. In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate? (a) Lead sulphate (insoluble) (b) Lead acetate (c) Ammonium nitrate (d) Potassium sulphate 14. Which of the following gases can be used for storage of fresh sample of an oil for a long time? (a) Carbon dioxide or oxygen (b) Nitrogen or oxygen (c) Carbon dioxide or helium (d) Helium or nitrogen 15. The following reaction is used for the preparation of oxygen gas in the laboratory 2KClO3 (s) Heat → Catalyst 2KCl (s) + 3O2 (g) Which of the following statement(s) is(are) correct about the reaction? (a) It is a decomposition reaction and endothermic in nature (b) It is a combination reaction (c) It is a decomposition reaction and accompanied by release of heat (d) It is a photochemical decomposition reaction and exothermic in nature 16. Which one of the following processes involve chemical reactions? (a) Storing of oxygen gas under pressure in a gas cylinder (b) Liquefaction of air (c) Keeping petrol in a china dish in the open (d) Heating copper wire in presence of air at high temperature 17. In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature? (a) 2H2 (l) + O2 (l) → 2H2O(g) (b) 2H2 (g) + O2 (l) → 2H2O(l) (c) 2H2 (g) + O2 (g) → 2H2O(l) (d) 2H2 (g) + O2 (g) → 2H2O(g) 18. Which of the following are combination reactions? (i) 2KClO3 → Heat 2KCl + 3O2 (ii) MgO + H2O → Mg(OH)2 (iii) 4Al + 3O2 → 2Al2 O3 (iv) Zn + FeSO4 → ZnSO4 + Fe (a) (i) and (iii) (b) (iii) and (iv) (c) (ii) and (iv) (d) (ii) and (iii) Multiple Choice Questions 1. What happens when a solution of an acid is mixed with a solution of a base in a test tube? (i) The temperature of the solution increases (ii) The temperature of the solution decreases (iii) The temperature of the solution remains the same (iv) Salt formation takes place (a) (i) only (b) (i) and (iii) (c) (ii) and (iii) (d) (i) and (iv) 2. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (a) Baking powder (b) Lime (c) Ammonium hydroxide solution (d) Hydrochloric acid 3. During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to (a) absorb the evolved gas (b) moisten the gas (c) absorb moisture from the gas (d) absorb Cl– ions from the evolved gas 4. Which of the following salts does not contain water of crystallisation? (a) Blue vitriol (b) Baking soda (c) Washing soda (d) Gypsum
  • 1 answers

Dipanshi Sharma 4 years, 1 month ago (12367091)

tell me the name of product
  • 0 answers
  • 1 answers

Chirag Khanna 4 years, 2 months ago (12193468)

Ok
  • 1 answers

Ajinkya Ubale 4 years, 2 months ago (11034834)

The statement tells that unlike the leaders of the sinhala community in Sri Lanka the leaders of our country didn't dominated on other states to use hindi compulsorily instead they gave equal status to all languages and prevented conflicts where as in sri lanka the sinhala community tried dominated their language over tamils hope it helps✌✌?
  • 5 answers

Nikita Choudhary 4 years, 1 month ago (11823295)

Zero dimensional defect

Pratham Garg 4 years, 1 month ago (10537930)

When the irregularity is found near a point is called point defect

Akash Thakur 4 years, 1 month ago (12019283)

When the irregularity is found near a point is called point defect

Kuldeepak Chaturvedi 4 years, 2 months ago (5661448)

Defect at some point generally at the atom..

Sita Kumari 4 years, 2 months ago (10386505)

Expected MCQ for term 1 chemistry

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