Mindblown: a blog about philosophy.

1. Propanone can be prepared from ethyne by (A) passing a mixture of ethyne and steam over a catalyst, magnesium at 420°C (B) passing a mixture of ethyne and ethanol over a catalyst zinc chromite (C) boiling ethyne with water in the presence of HgSO4 and H2SO4 (D) treating ethyne with iodine and NaOH 2.…

1. One mole of ethyl acetate on treatment with an excess of LiAlH4 in dry ether and subsequent acidification produces (A) 1 mole acetic acid + 1 mole ethyl alcohol (B) 1 mole ethyl alcohol + 1 mole methyl alcohol (C) 2 moles of ethyl alcohol (D) 1 mole of 2-butanol 2. Which of the…

1. Good conductor of electricity and heat is (A) Anthracite coke (B) Diamond (C) Graphite (D) Charcoal 2. In which of the following allotropes of carbon, percentage of carbon is maximum ? (A) Wood charcoal (B) Coconut charcoal (C) Graphite (D) None of these 3. The hybridisation of carbon in diamond is (A) sp3 (B)…

1. K2[Fe(CN)6] is a/an (A) double salt (B) complex salt (C) acid (D) base 2. Which of the following compounds has tetrahedral geometry ? (A) [Ni(CN)4]2- (B) [Pd(CN)4]2- (C) [PdCl4]2- (D) (NiCl4]2- 3. The number of possible isomers for the complex [Co(C2O4)(NH3)2] (A) 1 (B) 2 (C) 3 (D) 4 4. The oxidation state of…

1. Oxidation number of gold metal is (A) + 1 (B) O (C) – 1 (D) all of these 2. Shape of d-orbital is (A) spherical (B) dumb bell (C) double dumb bell (D) none of these 3. Electronic configuration of alkaline earth element is (A) ns2 (B) ns1 (C) np6 (D) nso 4. Outermost…

1. Boron shows diagonal relation with (A) Al (B) C (C) Si (D) Sn 2. Catenation property is maximum in (A) phosphorus (B) carbon (C) sulphur (D) zinc 3. Which one of the following is an electrophilic reagent ? (A) BF3 (B) NH3 (C) H2O (D) None of these 4. Element found from sea water…

1. Removal of the unwanted materials like sand, clays, etc. from the ore is known as ……., …… Or ……. (A) concentration, dressing, benefaction (B) separation, refining, gangue (C) magnetic separation, purification, gangue (D) washing, refining, amalgamation 2. How do we separate two sulphide ores by froth floatation method ? (A) By using excess of…

1. Volume of one mole of any gas at NTP is (A) 11.2 litre (B) 22.4 litre (C) 10.2 litre (D) 22.8 litre 2. Tyndall effect confirms the (A) gravity effect on the sol. particles (B) light scattering by the sol. particles (C) heterogeneous nature of sols. (D) Brownian motion of the sol. particles 3.…

1. In chemical equation H2 (g) + I2 (g) ⇌ 2HI (g) the equilibrium constant Kp depends on (A) total pressure (B) catalyst used (C) amount of H2 and I2 (D) temperature 2. If the rate of a reaction is expressed by, rate = k [A]2 [B], the order of reaction will be (A) 2 (B)…

1. If 96500 coulomb electricity is passed through CusO4 solution, it will liberate (A) 63.5 gm of Cu (B) 31.76 gm of Cu (C) 96500 gm of Cu (D) 100 gm of Cu 2. Fused NaCl on electrolysis gives …………… on cathode. (A) Chlroine (B) Sodium (C) Sodium amalgam (D) Hydrogen 3. The standard electrode…