Atomic weight of Ne is 20.2; Ne is mixture of Ne and Ne , percentage abundance of lighter isotope is — NEET Chemistry Past Papers Chemistry Question
Question
Atomic weight of Ne is 20.2; Ne is mixture of Ne and Ne , percentage abundance of lighter isotope is :- (A) 90 (B) 20 (C) 40 (D) 10 20 22 (1) 90 (2) 20 (3) 40 (4) 10 20 22 The orbital angular momentum of an electron in a d-orbital is :- (1) (2) (3) (4) √6 h 2π √2 h 2π h 2π 2h 2π (1) (2) (3) (4) √6 h 2π √2 h 2π h 2π 2h 2π Which of the following statements is/are wrong? (a) At equilibrium, concentrations of reactants and products become constant because the reaction stops (b) Addition of catalyst speeds up the forward reaction more than the backward reaction (c) Equilibrium constant of an exothermic reaction decreases with increase of temperature. (d) K is always greater than K (1) a, b (2) b, c, d (3) a, b, d (4) a, c p c (1) a, b (2) b, c, d (3) a, b, d (4) a, c p c K of a salt Ni(OH) is 2 × 10 then molar
💡 Solution & Explanation
ubility of Ni(OH) in 0.01M NaOH is :- (1) 2 × 10 M (2) 2 × 10 M (3) 2 × 10 M (4) 10 M sp 2 –15 2 –15 1/3 –5 –11 –7 (1) 2 × 10 M (2) 2 × 10 M (3) 2 × 10 M (4) 10 M 2 sp –15 2 –15 1/3 –5 –11 –7 If V ml of the vapours of substance at NTP weight W gm Molecular weight of substance is (1) (2) (3) (W – V) × 22400 (4) × 22400 W V × 22400 V W W V × 224 (1) (2) (3) (W – V) × 22400 (4) × 22400 W V × 22400 V W W V × 224 The oxidation number of phosphorus in Ba(H PO ) is :- (1) +3 (2) +2 (3) +1 (4) –1 2 2 2 (1) +3 (2) +2 (3) +1 (4) –1 2 2 2 The heat of solution of Na SO (s) and Na SO .10H O(s) are –2.34 kJ