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The sting of an ant contains___________. a) hydrochloric acid b) formic acid c) sulphuric acid d) nitric acid

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

5 answers

Lanin Gogoi 4 years, 7 months ago

Formic acid

Soumya Subhankar Sahoo 4 years, 7 months ago

(b) Formic Acid

Subrat Kumar Panda 4 years, 7 months ago

Answer is b

Subrat Kumar Panda 4 years, 7 months ago

What a easy questions you send

Stuti Tripathi 4 years, 7 months ago

B is the correct answer

ANSWER

Phenolphthalein is a synthetic indicator and its colour in acidic and basic solutions, are a) red and blue b) blue and red c) pink and colourless d) colourless and pink

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

3 answers

Pranav Prabhakar 4 years, 7 months ago

b)blue and red

Lanin Gogoi 4 years, 7 months ago

Maybe d

Soumya Subhankar Sahoo 4 years, 7 months ago

Maybe C

ANSWER

Products of a neutralization reaction are always: a) an acid and a base b) an acid and a salt c) a salt and water d) a salt and a base

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

2 answers

Pranav Prabhakar 4 years, 7 months ago

c)a salt and water

Kanu Choudhary 4 years, 7 months ago

Acid and base

ANSWER

To protect tooth decay, we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is: (a) acidic (b) basic (c) neutral (d) corrosive

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Priyanshi Mittal 4 years, 7 months ago

Basis

ANSWER

The substance whose odour changes in acidic (or) basic solutions are called a) universal indicators b) olfactory indicators c) natural indicators d) mixed indicator

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

The chemical name of washing soda is a) sodium bicarbonate b) sodium carbonate c) sodium hydroxide d) sodium chloride

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Priyanshi Mittal 4 years, 7 months ago

Sodium carbonate

ANSWER

Which nature does pH=7 solutions have? a) acidic b) basic c) neutral d) amphoteric

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Sheetal Choudhary 4 years, 7 months ago

Answer is c

ANSWER

Bases which are soluble in water are called a) acids b) alkaloids c) aromatics d) alkalis

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

pH scale was proposed by a) Sorensen b) Bohr c) Maxwell d) Schrodinger

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Sheetal Choudhary 4 years, 7 months ago

Answer is a

ANSWER

What is the colour of methyl orange in acidic medium a) red b) pink c) colourless d) yellow

Posted by Hirenya A 4 years, 5 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 4 years, 5 months ago

red

ANSWER

Acids, Bases and Salts The acid which is completely ionized into its ions is called as a) weak acid b) strong acid c) acidic salt d) none of these

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

14 Which amongst the following symbols is the correct representation for the formation of a precipitate? a) b) ↑ c) ↓ d) 

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

The colour of iron sulphate (aqueous) is a)Green b) Colourless c) Blue d) Pink 14 Which amongst the following symbols is the corr

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Which one of the following processes involves 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

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

The following reaction is used for the preparation of oxygen gas in the laboratory 2Kclo3(s) →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

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Which of the following gases can be used for storage of fresh sample of oil for a long time? a) Carbon dioxide or oxygen b) Nitrogen or oxygen c) Carbon dioxide or helium d) Helium or nitrogen

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

In 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 there, 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

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Which of the following is(are) an endothermic process(es)? a) Dilution of sulphuric acid b) Sublimation of dry ice c) Condensation of water vapours d) Evaporation of water a) A and C b) B only 3) C only 4) B and D

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

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

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following represent the type of the reaction involved? a) Displacement reaction b) Precipitation reaction c) Combination reaction d) Double displacement a) A only b) B only 3) D only 4) B and D

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Which among the following is (are) double displacement reaction(s)? a) Pb + CuCl2 → PbCl2 + Cu b) BaCl2 + Na2 SO4 → BaSO4 + 2NaCl c) C + O2 → CO2 d) CH4 + 2O2 → CO2 + 2H2 O a) A and D b) B only c) A and B d) C and D

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. 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 involved. d.KMno4 is an unstable compound and decomposes in presence of FeSO4 to a colourless compound

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Which of the following are exothermic processes? a) Reaction of water with quick lime b) Dilution of an acid c) Evaporation of water d) Sublimation of camphor (crystals)

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

The following reaction is an example of a 4NH3(g) + 5O2(g) → 4NO (g) + 6H2O(g) a)Displacement reaction b) Combination reaction c) Redox reaction d) Neutralization reaction a) A and D b) B and D c) A and C

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Which of the following is not a physical change? a) Boling of water to give water vapour b) Melting of ice to give water c) Dissolution of salt water d) Combustion of liquefied petroleum gas

Posted by Hirenya A 4 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Srijan P 4 years, 6 months ago

Say truly in which class do u

ANSWER

What is meaning of bhagyadheyam in hindi

Posted by Chandrahas Puri 4 years, 7 months ago

CBSE > Class 08 > Sanskrit

0 answers

ANSWER

Bhagyadheyam

Posted by Chandrahas Puri 4 years, 7 months ago

CBSE > Class 08 > Sanskrit

0 answers

ANSWER

Describe the morning as described by Jim in his letter

Posted by Baljeet Singh Baljeet Singh 4 years, 7 months ago

CBSE > Class 08 > English

0 answers

ANSWER

Corona वायरस से बचाव के उपाय के विषय में अनुच्छेद लिखे

Posted by Baljeet Singh Baljeet Singh 4 years, 7 months ago

CBSE > Class 08 > हिंदी

2 answers

?Drasty Patel? 4 years, 6 months ago

कोरोनावायरस हम सबको पता है कि कोरोनावायरस ने कितना कहर मचा रखा है इतनी कहर में भी डॉक्टर नर्स और आदि लोग हमारी मदद करने के लिए घर से बाहर निकलते हैं कोरोनावायरस की वजह से हमारी स्कूल बंद हो गई है हमारे पढाई का सबसे अच्छा तरीका हमसे दूर हो गया है इस वायरस को जल्दी से मारने के लिए वैक्सीन भी बनाई गई है पर अभी तो वैक्सीन के दोष भी कम पड़ रहे हैं कुछ लोग सिर्फ पहली वैक्सीन के बाद दूसरी वैक्सीन ले ही नहीं पा रहे हैं कोरोनावायरस से बचने के लिए सैनिटाइजर और मार्क्स का उपयोग जरूर कीजिए

Sarvesh Devi 4 years, 7 months ago

कोरोना वायरस (सीओवी) का संबंध वायरस के ऐसे परिवार से है जिसके संक्रमण से जुकाम से लेकर सांस लेने में तकलीफ जैसी समस्या हो सकती है। इस वायरस को पहले कभी नहीं देखा गया है। इस वायरस का संक्रमण दिसंबर में चीन के वुहान में शुरू हुआ था। डब्लूएचओ के मुताबिक बुखार, खांसी, सांस लेने में तकलीफ इसके लक्षण हैं। अब तक इस वायरस को फैलने से रोकने वाला कोई टीका नहीं बना है।

ANSWER

There are 4y²+y-8 student if 2y+16 student play foot ball how many opt basket ball

Posted by Ishika Katyan 4 years, 7 months ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

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