Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is halogen exchange reaction?

If r is radius of void and R is radius of the sphere, then for an atom to ocuppy an octahedral void which relation holds true?

An element exists in bcc lattice with a cell edge of $300pm$. Calculate the molar mass if density of the unit cell is $7g//c{m}^3$.

Take $N_A=6\times {10}^{23}$

Tick the item that is closest in meaning to the following phrases.

1. to take issue with

(i) to accept

(ii) to discuss

(iii) to disagree

(iv) to add

2. to give vent to

(i) to express

(ii) to emphasise

(iii) to suppress

(iv) to dismiss

3. to stand on one's feet

(i) to be physically strong

(ii) to be independent

(iii) to stand erect

(iv) to be successful

4. to be wound up

(i) to become active

(ii) to stop operating

(iii) to be transformed

(iv) to be destroyed

5. to meet one's match

(i) to meet a partner who has similar tastes

(ii) to meet an opponent

(iii) to meet someone who is equally able as oneself

(iv) to meet defeat

The nitrogen oxide that does not contain a N - N bond is:

Which metal gives hydrogen on heating with hot concentrated alkali?

Which of the following is the strongest acid? ($p{K}_a$ values given at ${25}^{o}C$)

The IUPAC name of this compound is?

The correct IUPAC name of $\left[Pt\right(N{H}_3{)}_{2}C{l}_2]$ is
(a) Diamminedichloridoplatinum (II)
(b) Diamminedichloridoplatinum (IV)
(c) Diamminedichloridoplatinum (0)
(d) Dichloridodiammineplatinum (IV)

For a given equilibrium reaction, an increase in temperature will

A thermodynamic system is taken from an
original state to an intermediate state by the linear process shown
in Fig. (12.13)

Its volume is then reduced to the
original value from E to F by an isobaric process. Calculate the
total work done by the gas from D to E to F

Assign oxidation numbers to the underlined elements in each of the following species:

(a) NaH₂PO₄ (b) NaHSO₄ (c) H₄P₂O₇ (d) K₂MnO₄

(e) CaO₂ (f) NaBH₄ (g) H₂S₂O₇ (h) KAl(SO₄)₂.12 H₂O

Silica is soluble in

The major product of the following reaction is :

Which of the following solutions containing weak acid and salt of its conjugate base has maximum buffer capacity?

What are the main constituents of dettol ?

Calculate the work done by $10g$ of an ideal gas of molecular weight $44$ in expanding reversibly and isothermally from a volume of $5$ to $10$ litre at $300K$.

$Mg$ can reduce $N{O}_3^{-}$ to $N{H}_3$ in basic medium.
$N{O}_3^{-}\left(aq\right)+Mg\left(s\right)+H_{2}O\to Mg\left(OH{)}_2\right(s)+O{H}^{-}(aq)+N{H}_3(g)$
A $25.0mL$ sample of $N{O}_3^{-}$ solution was treated with $Mg\left(s\right)$. The $N{H}_3\left(g\right)$ was passed into $100mL$ of $0.15NHCl$.
The excess of $HCl$ required $32.10mL$ of $0.10NNaOH$ for neutralization. What was the molarity of $N{O}_3^{-}$ ions in the original sample?

A stretched wire of length 110 cm is divided into three segments whose fundamental frequencies are in ratio 1 : 2 : 3. Their lengths must be

One mole of a gas is expanded from $1\text{L},10\text{atm},300\text{K}$ to $4\text{L},5\text{atm},600\text{K}$ against a constant external pressure of $1\text{atm}$. The heat capacity of gas is $50\text{J/K}.$Then the internal energy change during the process is: $(1\text{L atm}\simeq 100J)$.

Describe
the effect of:

a)
Addition of H₂

b)
Addition of CH₃OH

c)
Removal of CO

d)
Removal of CH₃OH

on
the equilibrium of the reaction:

$MgC{O}_3\underrightarrow{\Delta }\underset{–}{A}+C{O}_2$

$\underset{–}{A}+C$ or $Si$ or $Al\to Mg+CO$ or $Si{O}_2$ or $A{l}_2{O}_3$ $A$ is

The ionization enthalpy of hydrogen atom is 1.312×10⁶ j mol^-1. The energy required to excite the electron in the atom from n=1 to n=2 is: