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logo Homepage CBSE Class 7 Important Questions for Science – Physical and Chemical Changes B.Tech Admission 2018. Apply Now! MU OET 2018 SRMJEEE 2018 By Anuj William - December 15, 2014 Class 7 Important Questions for Science – Physical and Chemical Changes NCERT Exemplar Class 7 Science is very important resource for students preparing for VII Board Examination. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 7. Question from very important topics are covered by NCERT Exemplar Class 7. You also get idea about the type of questions and method to answer in your Class 7th examination. Here you can get Class 7 Important Questions Science based on NCERT Text book for Class VII. Science Class 7 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Physical and Chemical Changes for Class 7 Science subject. Science Important Questions Class 7 are given below. Multiple Choice Questions Which of the following is a physical change? (a) Rusting of iron (b) Combustion of magnesium ribbon (c) Burning of candle (d) Melting of wax Which of the following is a chemical change? (a) Twinkling of stars (b) Cooking of vegetables (c) Cutting of fruits (d) Boiling of water A chemical change may involve – (a) change in colour only (b) change in temperature only (c) evolution of gas only (d) any or all of the above Which of the following is/are true when milk changes into curd? (i) Its state is changed from liquid to semi solid. (ii) It changes colour. (iii) It changes taste. (iv) The change cannot be reversed. Choose the correct option from below : (a) (i) and (ii) are correct (b) (ii) and (iii) are correct (c) (i), (iii) and (iv) are correct (d) (i) to (iv) are correct A man painted his main gate made up of iron, to (i) prevent it from rusting. (ii) protect it from sun. (iii) make it look beautiful. (iv) make it dust free. Which of the above statement(s) is/are correct? (a) (i) and (ii) (b) (ii) and (iii) (c) only (ii) (d) (i) and (iii) Iron pillar near the Qutub Minar in Delhi is famous for the following facts. Which of these facts is responsible for its long stability? (a) It is more than 7 metres high. (b) It weighs about 6000 kg. (c) It was built more than 1600 years ago. (d) It has not rusted after such a long period. Galvanisation is a process used to prevent the rusting of which of the following? (a) Iron (b) Zinc (c) Aluminium (d) Copper Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a – (a) physical change that can be reversed. (b) chemical change that can be reversed. (c) physical change that cannot be reversed. (d) chemical change that cannot be reversed. Which of the following statement is incorrect for a chemical reaction? (a) Heat may be given out but never absorbed. (b) Sound may be produced. (c) A colour change may take place. (d) A gas may be evolved. Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and step II are: (a) physical and chemical changes respectively. (b) chemical and physical changes respectively. (c) both physical change. (d) both chemical change.

Posted by Anisha Nair 8 years ago

CBSE > Class 07 > Science

1 answers

Anisha Nair 8 years ago

Sry this question is sensed by mistake

1Thank You

ANSWER

Jagjeet Singh 8 years ago

Water cycle is the process in which water regularly is done in which first the water is evaporated and then the process in which the water is condensed by clouds and the rain fall begins and it comes to seas,ocean and river again and the process is continously is done.

0Thank You

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