Explore topic-wise InterviewSolutions in .

Which of the following acid is used with sodium chloride in the laboratory preparation of hydrogen chloride gas?

A desiccator is an air tight glass vessel with a suitable drying agent, _______ placed at the bottom of the vessel.

Easy way to learn atomic mass of elements.????

The molar conductance of sodium acetate$\left(C{H}_{3}COONa\right)$, hydrochloric acid$\left(HCl\right)$ and sodium chloride$\left(NaCl\right)$ at infinite dilution are $91.0\times {10}^{-4},426.16\times {10}^{-4}\text{and}126.45\times {10}^{-4}S{m}^{2}mo{l}^{-1}$ respectively, at ${25}^{\circ }C$. Calculate the molar conductance at infinite dilution of for acetic acid:

Which of the following expressions can be used for calculating the concentration of a solution formed by dissolving sugar in water?

(More than one option is correct)

Complete the following statements :

(a) Magnesium has 2 valence electrons in the ___ shell.

(b) The valency of nitrogen in $N_2$ molecule is ___

(c) Isotopes have different mass numbers because their nuclei contain different number of ___

(d) Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called ___

₁₄Si²⁸ and ₁₄Si²⁹ are called _______ .

Match the following reactions:-

$\begin{array}{cccc}& \text{Reaction Names}& & \text{Reactions}\\ \text{i}& \text{Displacement reaction}& & {\text{A. CaO + O}}_2\to {\text{2Ca(OH)}}_2\\ \text{ii}& \text{Decomposition Reaction}& & {\text{B. Fe + Pb(NO}}_3{)}_2\to {\text{Fe(NO}}_3{)}_2\text{+ Pb}\\ \text{iii}& \text{Redox Reaction}& & {\text{C. MgCl}}_2{\text{+ Ca(OH)}}_2\to {\text{Mg(OH)}}_2{\text{+ CaCl}}_2\\ \text{iv}& \text{Combination Reaction}& & {\text{D. KClO}}_3\to {\text{2KCl + 3O}}_2\\ \text{v}& \text{Double Displacement Reaction}& & {\text{E. CO}}_2{\text{+ H}}_2\to {\text{2CO + H}}_2\text{O}\end{array}$

Explain why, naphthalene balls kept in stored clothes in our homes disappear over a period of time.

Arrange solid, liquid and gas on the basis of rate of diffusion in ascending order.

Why
has the poet used the word ‘brimming’? What kind of a
picture does it create?

Two charged particles having charges $q_1$ and $q_2$ and masses $m_1$ and $m_2$ are projected with same velocity in a region of uniform magnetic field. They follow the trajectory as shown in figure. From this, we can conclude that-

Which one of the following group 17 elements has the smallest atomic radius?

Metallic Bond explanation and how metals are good conductor of electricity I need with diagram of metals examples

When alpha particle is sent through a thin foil, most of them go straight through the foil because?

A solution contains 30 mL of ethyl alcohol mixed with 100 mL of water. What is the concentration of the solution in terms of volume by volume percentage?

Which of the following is not a pure substance?

(a) Find the solubility of $KN{O}_{3}at{20}^{\circ }C$ when the mass of the empty dish is 50 g, the mass of dish and solution is 65 g, while the mass of dish and residue is 54.3 g.

(b) What weight of sodium nitrate will separate when a saturated solution containing 50 gram of water is cooled from ${50}^{\circ }Cto{30}^{\circ }C$? The solubility of $NaN{O}_{3}at{50}^{\circ }and{30}^{\circ }$ is 114 g and 86 g respectively.

What are the products of thermal decomposition of Hydrogen peroxide?

Graphene is an allotrope of carbon. What is the shape of the rings in its structure which is formed due to carbon combining with each other through covalent bonds?

Which of the following statement(s) is/are true about relative density?

Statement 1: Relative density is known as the specific gravity of the substance.

Statement 2: Relative density of a substance is the ratio of the density of the substance to the density of water at $4^{\circ }C$.

Statement 3: Relative density of a substance is the ratio of the mass of water at $4^{\circ }C$ to the mass of a substance at $4^{\circ }C$.

Statement 4: Relative density is unitless.

Identify the equipment inside a nuclear reactor that limits the chain reaction.

w $C_3{H}_8$ + x $O_2$ $\to$ y $H_{2}0$ + z $C{O}_2$

The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.

A chemical bond between two combining atoms can be formed by

2. Two substance I and II of carbon and oxygen have respectively 72.73% and 47.06% oxygen hence they follow

Select the option that will complete the given homologous series.

$C_3{H}_4$, $C_4{H}_6$, _______, $C_6{H}_{10}$, $C_7{H}_{12}$

Which of the following expressions correctly represents the equivalent conductance at infinite dilution of $A{l}_2(S{O}_4{)}_3$? Given that ${\Lambda }_{A{l}^{3+}}^o$ and ${\Lambda }_{S{O}_4^{2-}}^o$ are the equivalent conductances at infinite dilution of the respective ions.