Recent questions in Class 9

What is the volume of Object X?

asked Sep 11, 2017 by meena.p

1 answer

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

asked Sep 8, 2017 by meena.p

1 answer

The balancing of chemical equations is in accordance with:

asked Sep 8, 2017 by meena.p

1 answer

The charge/ mass ratio of electron:

asked Sep 8, 2017 by meena.p

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Dry ice on heating produces:

asked Sep 8, 2017 by meena.p

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?

asked Sep 8, 2017 by meena.p

1 answer

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

asked Sep 8, 2017 by meena.p

1 answer

Brass is a solution of molten copper in

asked Sep 8, 2017 by meena.p

1 answer

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

asked Sep 7, 2017 by meena.p

1 answer

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

asked Sep 7, 2017 by meena.p

1 answer

The major constituent of air is

asked Sep 7, 2017 by meena.p

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In sugar solution,

asked Sep 7, 2017 by meena.p

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As compared to beryllium, magnesium is

asked Sep 7, 2017 by meena.p

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The gas used for artificial ripening of green fruit is

asked Sep 7, 2017 by meena.p

1 answer

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

asked Sep 7, 2017 by meena.p

1 answer

The isotope deuterium of hydrogen has

asked Sep 7, 2017 by meena.p

1 answer

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

asked Sep 7, 2017 by meena.p

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?

asked Sep 7, 2017 by meena.p

1 answer

In solutions particles are

asked Sep 7, 2017 by meena.p

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

asked Sep 7, 2017 by meena.p

1 answer

Elements in the same period have the same number of .

asked Sep 7, 2017 by meena.p

1 answer

The components of water can be separated by

asked Sep 6, 2017 by meena.p

1 answer

$CO_2$ can be easily liquefied and even solidified because

asked Sep 6, 2017 by meena.p

1 answer

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

asked Sep 6, 2017 by meena.p

1 answer

The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is

asked Sep 6, 2017 by meena.p

1 answer

The main use of salt in the diet is to

asked Sep 6, 2017 by meena.p

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Atoms which have same number of protons but different number of neutrons are called

asked Sep 6, 2017 by meena.p

1 answer

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

asked Sep 6, 2017 by meena.p

1 answer

A student was asked to mix the white of an egg with water and stir well. The student observed that

asked Sep 6, 2017 by meena.p

1 answer

What are the number of moles of $CO_2$ which contains 16 g of oxygen?

asked Sep 6, 2017 by meena.p

1 answer

$CO_2$ can be easily liquified and even solidified because

asked Sep 6, 2017 by meena.p

1 answer

The isotope used to remove the brain tumours and treatment of cancer is

asked Sep 6, 2017 by meena.p

1 answer

If we burn graphite,

asked Sep 6, 2017 by meena.p

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Electrochemical cells convert

asked Sep 6, 2017 by meena.p

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The heat required to raise the temperature of body by 1 K is called

asked Sep 6, 2017 by meena.p

1 answer

When NaCl is dissolved in water, negative end of water molecules is attracted towards

asked Sep 6, 2017 by meena.p

1 answer

Which of the following refers to the chemical reaction that links monomers to form polymers and that releases water?

asked Sep 6, 2017 by meena.p

1 answer

What is the substance that increases the rate of a reaction by lowering the activation energy?

asked Sep 6, 2017 by meena.p

1 answer

Which statement best explains why a tree branch floats on water?

asked Sep 6, 2017 by meena.p

1 answer

What's the lightest element in the periodic table?

asked Sep 6, 2017 by meena.p

1 answer

The mass of $P_4O_{10}$ that will be obtained from the reaction of $1.33\; gram$ of $P_4$ and $5.07$ of oxygen is

asked Sep 6, 2017 by meena.p

1 answer

The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called

asked Sep 6, 2017 by meena.p

1 answer

Molarity of solution which contains $40 \;g$ urea dissolved in $500\;cm^3$ is

asked Sep 6, 2017 by meena.p

1 answer

How many electrons, protons and neutrons are present in X+ , if atomic number of X is 19 and its mass number is 39

asked Sep 6, 2017 by meena.p

1 answer

Which of these is a proton donor?

asked Sep 6, 2017 by meena.p

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Which of these is a property of ice that allows fish to survive in ponds when air temperatures are below $0^{\circ}$ C?

asked Sep 6, 2017 by meena.p

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?

asked Sep 6, 2017 by meena.p

1 answer

Which of the following is a correct statement:

asked Sep 6, 2017 by meena.p

1 answer

We get the smell of hot food in the kitchen outside the house because of:

asked Sep 6, 2017 by meena.p

1 answer

What are the most common elements in the human body?

asked Sep 6, 2017 by meena.p

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