Nitric acid ionises slightly in HF,

$\underset{\left(\mathrm{Solvent}\right)}{{\mathrm{HNO}}_3 + \mathrm{HF} \rightleftharpoons {\mathrm{H}}_2{\mathrm{NO}}_3^{+} + {\mathrm{F}}^{-}}$ Then.

• HNO₃ and H₂NO${}_3^{+}$

• HF and F^- are bases

• HNO₃ and F^- are bases

• only HNO₃ is base

For the reaction, 2NO(g) + Cl₂(g) $\rightleftharpoons$2NOCl(g). which relation is true ?

• K_P=K_c × RT

• ${\mathrm{K}}_{\mathrm{P}}= \frac{{\mathrm{K}}_{\mathrm{c}}}{\mathrm{RT}}$

• ${\mathrm{K}}_{\mathrm{P}}= {\mathrm{K}}_{\mathrm{c}}(\mathrm{RT}{)}^2$

• ${\mathrm{K}}_{\mathrm{P}}= \frac{{\mathrm{K}}_{\mathrm{c}}}{{\left(\mathrm{RT}\right)}^2}$

3.

The pair having the similar shape is

• BF₃ and NF₃

• ${\mathrm{BF}}_4^{-} \mathrm{and} {\mathrm{NH}}_4^{+}$

• ${\mathrm{SiCl}}_4 \mathrm{and} {\mathrm{SCl}}_4$

• ${\mathrm{CH}}_3^{+} \mathrm{and} {\mathrm{H}}_3{\mathrm{O}}^{+}$

The wavelength of an electron having kinetic energy equal to 4.55 × 10^-25 J is (h = 6.6 × 10^-34 kgm²s^-1, mass of electron = 9.1 × 10^-31 kg)

• 7.25 × 10^-7 nm

• 725 nm

• 7.25 × 10^-7 m

• 7.25 × 10⁷ nm

Which one of the following molecules has zero dipole moment?

• NO${}_2^{+}$

• H₂O

• NH₃

• CO

A proton is converted to a neutron by

1.β^- emission

2.β⁺ emission

3. electron capture

Which of the statements given above are correct?

• (1) and (2) only 

• (2) and (3) only

• (1) and (3) only

• (1), (2) and (3)

If the molar solubility of X₃B₃(AlF₆)₂ at 298 K is x, the solubility product K_sp is

• 18x³

• 27x⁴

• 27x⁸

• 2916x⁸

In Neptunium series

${}_{94}{}^{241}\mathrm{Pu}\to \mathrm{Am}\to \mathrm{Np}\to \mathrm{Pa}\to {}_{92}{}^{238}\mathrm{U},$ the order of radiation

• β,α,α,β

• β,β,α,α

• α,α,β,β

• α,β,α,β

Indicate the pair whose one member has the highest and other has the lowest electronegativity

• I and F

• Fr and Li

• K and Cs

• F and Fr

Atomic numbers of elements X, Y and Z are 50, 78 and 60 respectively. These elements are placed in modem long form of Periodic Table respectively in

• p-block, d-block and f-block

• p-block, d-block and s-block

• s-block, p-block and d-block

• s-block, d-block and f-block