JEE Main, NEET MCQs Set 2 1

50 cm³ of 0.2 N HCI is titrated against 0.1 N NaOH solution. The titration is discontinued after adding 50 cm³ of NaOH. The remaining titration is completed by adding 0.5 N KOH. The volume of KOH required for completing the titration is ______.

80 g of oxygen contains as many atoms as in

9.65 C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus obtained is completely converted into a Grignard reagent. The number of moles of the Grignard reagent obtained is ______.

A 6% solution of urea is isotonic with

A bivalent metal has an equivalent mass of 32. The molecular mass of the metal nitrate is

A body of mass 10 mg is moving with a velocity of 100 ms^–1. The wavelength of de-Broglie wave associated with it would be

(Note : h = 6.63 ´ 10^–34Js)

A body of mass x kg is moving with a velocity of 100 ms^–1. Its de Broglie wavelength is 6.62 ´ 10^–35m.
Hence x is (h = 6.62 ´ 10^–34Js)

A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm³ of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved.
The pH of the resulting buffer is equal to ______.

A buffer solution is prepared in which the concentration of NH₃ is 0.30 M and the concentration of   is 0.20 M. If the equilibrium constant, K_b for NH₃ equals 1.8 × 10^–5, what is the pH of this solution?

A complex compound in which the oxidation number of a metal is zero is

Which of the following is used to prepare Cl₂ gas at room temperature from concentrated HCI?

Which of the following is not an ore of magnesium?

Which of the following has the highest bond order?

Which of the following gives an aldehyde on dry distillation?

Which of the following does not give benzoic acid on hydrolysis?