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नमूना प्रश्न

JEE Advanced Chemistry
The molar conductivity of a 0.02 M solution of a weak acid is 8.0 × 10⁻⁴ S m²/mol. If the limiting molar conductivity is 4.0 × 10⁻² S m²/mol, the dissociation constant of the acid is:
A 4.0 × 10⁻⁵ mol/L
B 1.6 × 10⁻⁵ mol/L
C 8.0 × 10⁻⁶ mol/L
D 2.0 × 10⁻⁶ mol/L
NEET Chemistry
Which of the following statements about Group 16 elements (chalcogens) is correct?
A Ionization enthalpy decreases down the group while electron gain enthalpy becomes less negative from O to Te
B Atomic radius decreases down the group
C All elements show only -2 oxidation state
D Melting and boiling points decrease down the group
CUET Chemistry
An optically active alkyl halide R−X undergoes SN2 reaction with NaOH. The product will be:
A Optically active with inverted configuration
B Optically inactive (racemic mixture)
C Optically active with retained configuration
D Optically inactive due to formation of a symmetric molecule
VITEEE Chemistry
At STP, 1 mole of an ideal gas occupies a volume of:
A 22.4 L
B 2.24 L
C 224 L
D 11.2 L
EAPCET Chemistry
Which of the following species has the shortest N−O bond length?
A NO₃⁻ (nitrate ion)
B NO⁺ (nitrosonium ion)
C NO₂ (nitrogen dioxide)
D NO⁻ (nitrosyl anion)
BITSAT Chemistry
Which of the following lanthanoids is most stable in the +4 oxidation state?
A Ce
B Eu
C Yb
D Tb
EAPCET Chemistry
The solubility product of Ag₂CrO₄ is 1.1 × 10⁻¹² at 298 K. What is the molar solubility of Ag₂CrO₄ in 0.1 M AgNO₃ solution?
A 1.1 × 10⁻¹⁰ M
B 1.05 × 10⁻⁵ M
C 7.4 × 10⁻⁷ M
D 3.3 × 10⁻⁸ M
Class 12 Chemistry
The correct order of acidic strength for the following is: HF, HCl, HBr, HI:
A HF > HCl > HBr > HI
B HCl > HBr > HI > HF
C HI > HBr > HCl > HF
D HBr > HI > HCl > HF

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