Explore topic-wise InterviewSolutions in .

What happens when (Give equations of the chemical reaction)
(i) Sodium ethanoate is heated with soda lime.
(ii) Ethanoic acid is warmed with methanol in presence of concentrated sulphuric acid.

Identify the colour of deposit formed on the surface of copper when it is exposed to moist air.

${}_6{C}^{12}$ contains ................... protons and ............. neutrons.

The magnitude of forbidden energy gap is -

(a) Copy and complete the following table which refers to two practical applications of electrolysis

$\begin{array}{cccc}& Anode& Electrolyte& Cathode\\ \left(i\right)Silverplating& & Solutionof& \\ ofaspoon& & potassium& \\ & & argentocyanide& \\ \left(ii\right)Purification& & & \\ Ofcopper& & & \\ \left(iii\right)Extraction& & & \\ Ofsodium& & & \end{array}$

(b) Write equations of reactions taking place at anode for Q.2(a).

Question 50

A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming

(a) Identify A, B and C

(b) To which Group of Periodic Table does A belong?

Sulphuric acid can be prepared by reacting Sulphur with

In the following reaction $H_2$$O_2$ act as

$H_2$$O_2$ + X $\to$ $O_2$ + B

Hydrogen gas leaked out of a cylinder and only one gram of it was left. How many molecules are there in this one gram of hydrogen gas that is in constant random motion?

Calculate ${\Lambda }_{HN{O}_3}^0$ and ${\Lambda }_{HOAc}^0$ using appropriate molar conductances of the electrolytes listed below at infinite dilution in $H_{2}O$ at ${25}^{\circ }C$.

Which of the following are weak acids?

In a laboratory, the teacher asked Shreya how many types of gas can be obtained from dilute $H_{2}S{O}_4$. What do you think so?

What is denticity of oxo , per-oxo and super-oxo ligand?

${}_{12}^6\text{C}{,}_{14}^6\text{C}{,}_{16}^6\text{C}$ differ in number of __________.

Name the metal whose carbonate is known as washing soda.

why ionic compounds are bad conductors of electricity and good conductor in molten or aqueous

For the composting to be efficient, what should be the nature of the organic content being used?

Heating of Water increases the energy of the molecules of water this leads to an increase in the dissociation of the molecules.does this name the pH of the water has changed does it mean that water becomes acidic or basic apon hearing explain your answer briefly

The most abundant metal present in the Earth's crust is ____.

The X and Y in the given equation respectively are :
$C{H}_{3}COO{C}_2{H}_6\stackrel{NaOH}{\to }X+Y$

Which of the following is not a freon?

(a) Match the terms given in column I with the terms given in column II and column III having the same meaning :

$\begin{array}{ccc}\text{Column I}& \text{Column II}& \text{Column III}\\ \text{(i) Secondary consumer}& \text{Herbivore}& \text{1st trophic level}\\ \text{(ii) Primary consumer}& \text{Autotroph}& \text{3rd trophic level}\\ \text{(iii) Producer}& \text{Carnivore}& \text{4th trophic level}\\ \text{(iv) Tertiary consumer}& \text{Large Carnivore}& \text{2nd trophic level}\end{array}$

(b) Give one example of a food chain having four organisms.Below each organism write the three appropriate terms from the part (a) above which you think it represents.

Li has 1 electron in its outer shell, Cl has 7 electrons in its outer shell. Choose the correct options:

When a bee stings it injects:-