Recent questions and answers in Class 9

An electrolytic cell uses electrical energy to drive

answered Apr 10, 2020 by divyaragu18

2 answers

In the separation of dyes A and B by chromatography, component B has more solubility in the solvent. Which component will rise faster?

answered Sep 16, 2019 by porresdl1986

1 answer

Which one is not a source of carbohydrate?

answered Aug 15, 2019 by alagujothi21

2 answers

Hair contains keratin proteins which are also present in nails and wool is an example of

answered Jun 11, 2018 by saulatv3

2 answers

Which one of the followings sets of quantum numbers represents the highest energy level in an atom?

answered May 28, 2018 by meena.p

1 answer

Which of the following actions increases the rate of dissolving?

answered May 24, 2018 by sharmaaparna1

1 answer

Air contains 78 percent nitrogen, 21 percent oxygen, and one percent argon. Which gas is the solvent?

answered May 24, 2018 by sharmaaparna1

1 answer

On increasing temperature of amorphous solid they

answered May 24, 2018 by sharmaaparna1

1 answer

What is the volume of Object X?

answered May 24, 2018 by sharmaaparna1

1 answer

If an object has a density of $3.6 g/mL $ and you put it into water, will it sink or float?

answered May 23, 2018 by sharmaaparna1

1 answer

The balancing of chemical equations is in accordance with:

answered May 23, 2018 by sharmaaparna1

1 answer

The charge/ mass ratio of electron:

answered May 23, 2018 by sharmaaparna1

1 answer

Dry ice on heating produces:

answered May 23, 2018 by sharmaaparna1

1 answer

A student is pouring equal amounts of water, maple syrup, and cooking oil into a glass beaker and looking at how the layers settle. Which property of the liquids is the student most likely comparing?

answered May 23, 2018 by sharmaaparna1

1 answer

The formula of ethanol is $C_2H_5 – OH$. What will be its molecular mass?

answered May 22, 2018 by sharmaaparna1

1 answer

Brass is a solution of molten copper in

answered May 22, 2018 by sharmaaparna1

1 answer

Which of the following compounds when dissolved in water gives coloured solution ?

answered May 22, 2018 by sharmaaparna1

1 answer

The number of electrons presents in $H^+$ is

answered May 22, 2018 by sharmaaparna1

1 answer

The major constituent of air is

answered May 21, 2018 by sharmaaparna1

1 answer

In sugar solution,

answered May 21, 2018 by sharmaaparna1

1 answer

As compared to beryllium, magnesium is

answered May 21, 2018 by sharmaaparna1

1 answer

The gas used for artificial ripening of green fruit is

answered May 21, 2018 by sharmaaparna1

1 answer

The material which can be deformed permanently by heat and pressure is called a

answered May 21, 2018 by sharmaaparna1

1 answer

The isotope deuterium of hydrogen has

answered May 21, 2018 by sharmaaparna1

1 answer

Elements with more than 1 energy level will lose, gain or share electrons until they have _____________ valence electrons.

answered May 21, 2018 by sharmaaparna1

1 answer

Batman and Robin were studying physical and chemical properties of matter. They determined that the mass of a sample was 50 grams. Which sentence best states how mass describes matter?

answered May 21, 2018 by sharmaaparna1

1 answer

In solutions particles are

answered May 21, 2018 by sharmaaparna1

1 answer

Which difference between water and ice results in ice floating on cold water?

answered May 21, 2018 by sharmaaparna1

1 answer

Elements in the same period have the same number of .

answered May 21, 2018 by sharmaaparna1

1 answer

The components of water can be separated by

answered May 21, 2018 by sharmaaparna1

1 answer

$CO_2$ can be easily liquefied and even solidified because

answered May 21, 2018 by sharmaaparna1

1 answer

In the preparation of temporary mount of onion peel which of the following is not used :

answered May 21, 2018 by sharmaaparna1

1 answer