Explore topic-wise InterviewSolutions in Current Affairs.

Assertion (A): Permanent hardness of water is removed by treatment with washing soda.
Reason(R): Washing soda reacts with soluble magnesium and calcium sulphate to form water-soluble compounds.

When does a fire produce smoke?

Which of the following is correct about microbes?

What is the mass of an electron in kgs?

In India, which association advises people on saving petrol or diesel while driving?

Name any two metals that can be obtained by the process of electro refining of metal

On heating a sublimate solid ,the molecules break free and escape from surface of the solid directly into vapour

Find the maximum compression in the spring, if the lower block is shifted rightwards with acceleration 'a'. All the surfaces are smooth

A copper coin was kept in silver nitrate solution for a few days. what will happen to the copper coin and what will happen to the colour of the solution write the balanced equation

Define empirical and molecular formulas with a suitable example.

Which plastic is used in making parts of refrigerators, gears of machines and toys?

Nylon is not used in making:

The emission of light by a solid that has been heated is called:

Match the following:

$$\begin{array}{cccc}\left(i\right)& \text{Water}& \text{(A)}& \text{Compound}\\ \left(ii\right)& \text{Hydrogen}& \text{(B)}& \text{Element}\\ \left(iii\right)& \text{Salt}& & \\ \left(iv\right)& \text{Gold}& & \\ \left(v\right)& \text{Carbon dioxide}& & \\ \left(vi\right)& \text{Iron}& & \end{array}$$
The correct pairs are:-

The man-made fibre made from the cellulose polymer is :

(a) nylon (b) acrylic (c) rayon (d) polyester

Give two examples each of solid fuels, liquid fuels and gaseous fuels.

Write the uses of the following substances -

(a) Teflon (b) Dye

When an iron rod is heated at an end A, we feel heat at the end B. Which property of the iron rod does it indicate?

Calculate mass/volume percentage of 20% solution by mass of sulphuric acid

Emissions from what are a major cause of environmental pollution?

Which of the following is the main cause of global warming ?

(a) nitrogen dioxide

(b) sulphur dioxide

(c) carbon dioxide

(d) ozone

Why do you think nylon is used in making fishing nets?

Some of the water quality parameters are measured by titrating a water sample with a titrant. Group-I gives a list of parameters and Group-II gives the list of titrant.



$$\begin{array}{cc}\text{Groups - I}& \text{Groups - II}\\ \text{P. Alkalinity}& \text{1.}N/35.5AgN{O}_3\\ \text{Q. Hardness}& \text{2.}N/40N{a}_2{S}_2{O}_3\\ \text{R. Chloride}& \text{3.}{H}_{2}S{O}_4\\ \text{S. Dissolved oxygen}& \text{4.}N/50EDTA\end{array}$$Codes: