Recent questions and answers in Class 7

Two students of Class VI have performed the same experiment 'Separation of Sugar' by different methods as shown below: Which of the following statements are correct? I. Method I is faster than method 2. II. Method 2 leads to the decomposition of sugar to carbon. III. Method 2 is more appropriate than method I. IV Method 2 is slow but pure sugar is obtamed without getting decomposed.

answered Jan 6, 2022 by coome20100311

1 answer

A large amount of heat is produced in power plants while energy is released which turns

answered Aug 30, 2021 by faxalelahi982

2 answers

If mass of a substance will be lowered its density will be

answered Apr 5, 2020 by aliyanalisandhu1010

2 answers

Which of the following statements is/are true for sexual reproduction in plants? (i) Plants are obtained from seeds (ii) Two plants are always essential (iii) Fertilisation can occur only after pollination (iv) Only insects are agents of pollination Choose from the options given below

answered Feb 15, 2019 by wajidakhan080

2 answers

Which of the following gases is lighter than air ?

answered Apr 17, 2018 by sharmaaparna1

1 answer

Which one of the following is non metal?

answered Apr 10, 2018 by sharmaaparna1

1 answer

Which of the following property is not responsible for copper to be used as electrical conduction wires?

answered Apr 9, 2018 by sharmaaparna1

1 answer

Which of the following will work best as a tester for electric current?

answered Apr 9, 2018 by sharmaaparna1

1 answer

Which scientist was the first to show electrolysis of water?

answered Apr 9, 2018 by sharmaaparna1

1 answer

Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resources?

answered Apr 9, 2018 by sharmaaparna1

1 answer

A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called

answered Apr 6, 2018 by sharmaaparna1

1 answer

How many colours the sunlight spectrum has?

answered Apr 6, 2018 by sharmaaparna1

1 answer

Which of the following has an organic origin?

answered Apr 6, 2018 by sharmaaparna1

1 answer

Which of the following is necessary for burning (combustion)?

answered Apr 6, 2018 by sharmaaparna1

2 answers

The three states of matter are solid, liquid and gas.

answered Apr 6, 2018 by sharmaaparna1

1 answer

Metal pots are often made shiny on surface outside especially on the top and side and that makes sense thermally because this ___ .

answered Apr 6, 2018 by sharmaaparna1

1 answer

Movement of electrons in fixed orbits around nucleus was given by

answered Apr 6, 2018 by sharmaaparna1

1 answer

Carbon, hydrogen and oxygen combines together to make

answered Apr 6, 2018 by sharmaaparna1

1 answer

At end of a reaction, catalyst

answered Apr 6, 2018 by sharmaaparna1

1 answer

‘Bar’ is the unit of ?

answered Apr 6, 2018 by sharmaaparna1

1 answer