Explore topic-wise InterviewSolutions in .

What is meant by the term' separation of mixtures'. give reasons why the constituent of a mixture are separated .

Match articles given in column I with the corresponding fibres of Column II.
$$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{(a) Sweater}& \text{(i) Cotton}\\ \text{(b) Parachute canopies}& \text{(ii) Wool}\\ \text{(c) Dhoti}& \text{(iii) Nylon}\\ \text{(d) Gunny bags}& \text{(iv) Jute}\end{array}$$

What are the necessary conditions for rust formation in Iron?

Use the correct form of the verb in the bracket to complete the sentence.

The maid _______ the tub with water, won’t she? (Fill)

Centrifugation can be used for:

The property which forms the basis of winnowing technique is:

The tea leaves is removed from tea by a process called ___ .

Which techniques will be used to separate a mixture of sand, salt and water?

Which of the following properties of air is/are not true?

Which of the following process would be used to obtain the components of copper sulphate solution in water?

An ice cube contains a large air bubble. The cube is floating on the surface of water contained on a trough. What will happen to the water level, when the cube melts?

In the rainy seasons, water gets collected in empty pots on the roof. But after a few days, no more water is there. What has happened here? Explain. [2 MARKS]

Which of the following options are wrong regarding humus.

Why does solubility of gases increase with decrease in temperature?

The solution in which no more amount of solute can be dissolved in the solvent at a particular temperature is :

The circulation of water between ____________ and ____________ is refered to as water cycle.

Which of the following prohibits the water to seep under the ground?

Particles of matter attract each other. Then why isn't the entire universe as one piece?

Which of the following materials will be soluble in water?

What is the change taking place in the following processes?

Look at the following table below.

$$\begin{array}{cc}Classinterval& Classmark\\ 0-5& A\\ 5-10& B\\ 10-15& 12.5\\ 15-20& 17.5\end{array}$$

The value of A & B respectively are:

The heavier and lighter elements can be separated by using ___ method.

Food is wrapped in aluminum foils. The aluminium is converted into foils due to its:

Which of the following is/are correct with respect to carbon monoxide?
(i) It is released due to incomplete combustion of fuels.
(ii) It does not affect humans.
(iii) It is a poisonous gas.
(iv) It reduces oxygen-carrying capacity of the blood.
(v) It is released from vehicles.

Question 22

Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

In filtration, the pore size of the filter should be:

A cotton shirt completes a long journey before it reaches you. Elaborate this journey starting from cotton bolls.

Which major gas released in the atmosphere is responsible for global warming?

Is water a moving thing ?

Describe a simple activity to show the random motion of particles of matter

What are the sources of fibers? Explain. [2 MARKS]

Mention five differences between weaving and knitting? [5 MARKS]

Question 13

Mixtures of red chilli powder in water, butter in water, petrol in water and honey in water were given to Radha, Sudha, Sofia and Raveena, respectively. Whose mixture is in solution form?

Which of the following element is correctly matched with its symbol?

Question 20

It was Paheli's birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli's home:
(a) Simba blew balloons and put them on the wall.
(b) Some of the balloons got burst.
(c) Paheli cut colourful strips of paper and put them on the wall with the help of tape.
(d) She also made some flowers by origami (paper folding) to decorate the house.
(e) Her father made dough balls.
(f) Mother rolled the dough balls to make puries.
(g) Mother heated oil in a pan.
(h) Father fried the puries in hot oil.
Identify the activities at Paheli's home, as those that can be reversed and those, which cannot be reversed.

Which of the following components can be separated by using a magnet?

Why is the use of CNG in vehicles is still limited?

The energy associated with air is because ___ .

X is a gas popularly called as laughing gas. It is also used as an anesthesia. X is

A solution is a homogeneous mixture of two or more substances. Which of the following solutions is possible?

Pick the correctly punctuated form of the given sentence.

Martha said to her husband george “Breakfast is served dear.”

Varun went on an educational trip to Gujarat. He made a diary entry of his visit and enlisted a lot of things he saw during his visit. He is making a list of things which require air as an important component for functioning but he is not sure. Help him to make the list of activities where air plays a major role in functioning. The list is as follows:

1)Varun visited a windmill power plant and observed how power is generated.

2)He visited many monuments including Gandhi Ashram.

3)He participated in a kite flying competition.

4)He started reading a new book on "Atmosphere”.

5)He did sky diving where he jumped from a great height and landed on the ground through a parachute.

6) He and his team mates did a camp fire.

In ancient times, which of the following were twisted together into long strands?