Explore topic-wise InterviewSolutions in .

Which of the following characteristic is shown by particle of matter?

Which is the most suitable metal for the preparation of hydrogen?

Identify the number of atoms of oxygen present in $3HN{O}_3$

___ charcoal is obtained by removing water and some other volatile constituents from the animal and vegetation substances.

Match the entries in Column - I with those in Column - II
$\begin{array}{cccc}& \text{Column - I}& & \text{Column - II}\\ \text{a.}& \text{A chalk water}& \text{1.}& \text{A gaseous}\\ & \text{mixture}& & \text{mixture}\\ \text{b.}& \text{A glucose}& \text{2.}& \text{A heterogeneous}\\ & \text{solution}& & \text{solid-liquid mixture}\\ \text{c.}& \text{Carbonated}& \text{3.}& \text{A homogeneous}\\ & \text{water}& & \text{solid-liquid mixture}\\ \text{d.}& \text{Air}& \text{4.}& \text{A gas-liquid mixture}\end{array}$

Why bulb is filled with inert gases ?

Describe in detail: Separation of different components of a mixture, different types of separation methods, and their use in daily life.

What would be the gravitational potential energy of an object whose mass is $\text{1 kg}$ and is at a height of $\text{10 m}$? $(g=9.8m{s}^{-}2)$

Which of the following compounds has the same empirical formula as that of glucose

Define ignition temperature of a substance.

Sting of ants and bees contain_______________.

Name some particulate pollutants.

Mohair is a type of silk or wool?

I somewhere read that Europa, the moon of Jupiter have more water than on earth. Please explain about it how it is possible because earth's 2/3rd surface is water and Europa is just 1/4th of whole earth.

When we heat a coloured salt, it turns into white coloured __________ salt.

If the same amount of salt and sand are mixed then what happens to the taste of the salt crystals.

State whether plastic is biodegradable or non-biodegradable ? Give reasons for your answer

What is the mass of an electron in kgs?

$Na$ + $O$ $\to$ $Y$

$Y$ + $H_{2}O$ $\to$ $Z$

Identify Z.

Which of the following statement is true about Pascal’s Law?

What is meant by rapid combustion ? Give one example of rapid combustion.

Which of the following metal can displace all the others of the following metals from their salt solution?

Salts while crystallising out from their aqueous solution, unite with a definite quantity of water which is known as _________ .

Assertion: Upal observed that copper is deposited on the negative electrode connected to the terminal of the battery. Kavya performed the same experiment but she replaced the copper electrode with a carbon electrode and still observed copper is deposited over carbon rod.

Reason: Copper sulphate solution dissociates into copper and sulphate ions when electricity is passed through dilute copper sulphate solution and this free copper ions deposit on the carbon rod.

(a) Name a process by which hydrogen gas is manufactured.

(b) Give equations for the reactions.

(c) How is hydrogen separated from carbon dioxide and carbon monoxide ?

Which synthetic fibre is known as artificial silk?

Nylon is made from:

Suppose you have to determine the percentage of carbon dioxide in a sample of gas available in a container. Which among the following is the best absorbing material for carbon dioxide?

Some easy example of uses of metals and non metals

Which of the following is not a chemical method to purify water?

A reaction in which same element is simultaneously oxidized as well as reduced is called

Choose the correct option according to the angle between force and direction of displacement.

$$\begin{array}{cc}\text{Coloumn1}& \text{Coloumn2}\\ 1.\theta \text{is zero}& \text{i) Work done is always zero}\\ 2.\theta \text{is less than}{90}^0& \text{ii) Work done is non-negative}\\ 3.\theta \text{is greater than}{90}^0& \text{iii) Work done is always positive}\\ 4.\theta \text{is}{90}^0& \text{iv) Work done is never positive}\end{array}$$

A solution contains $x$ ml of ethyl alcohol mixed with 100ml of water. The concentration of the solution is 28.6% in terms of volume by volume percentage. Find $x$.

The word atom comes from the word "$atomos$". Who coined this word?

Raghav is planning to start a bonfire in the evening and has collected lot of dry wood and leaves. He fetches a matchbox and starts the fire. In this example, what do you think is the activation energy?

Rayon is a synthetic fibre but smells like burning paper.Why?