Mindblown: a blog about philosophy.
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THE D- AND f-BLOCK ELEMENTS
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…
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THE P-BLOCK ELEMENTS
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…
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GENERAL PRINCIPLES & PROCESSES OF ISOLATION OF ELEMENTS
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…
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SURFACE CHEMISTRY
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.…
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CHEMICAL KINETICS
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)…
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ELECTROCHEMISTRY
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…
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SOLUTION
1. If 2 gm of NaOH is present is 200 ml of its solution, its molarity will be (A) 0.25 (B) 0.5 (C) 5 (D) 10 2. 234.2 gm of sugar syrup contains 34.2 gm’df sugar. What is the molal concentration of the solution ? (A) 0.1 (B) 0.5 (C) 5.5 (D) 55 3. Atomic…
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SOLID STATE
1. Which one of the following is non-crystalline or amorphous ? (A) Diamond (B) Graphite (C) Glass (D) Common Salt 2. NaCl typecrystal (with coordination no. 6:6) can be converted into CsCl type crystal (with coordination no. 8:8) by applying (A) high temperature (B) high pressure (C) high temperature and high pressure (D) low temperature…
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MOVING CHARGES AND MAGNETISM
1. The current sensitivity of a moving coil galvanometer increases with decrease in : (A) magnetic field (B) area of a coil (C) number of turns (D) None of these 2. Acurrent carrying coil is placed in a uniform magnetic field. If the coll turns through an angle O, then the torque is directly proportional…
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CURRENT ELECTRICITY
1. The speed at which the current travels in a conductor is nearly : (A) 3 x 104 ms-1 (B) 3 x 106 ms-1 (C) 3 x 108 ms-1 (D) 3 x 1010 ms-1 2. The resistance of a human body is about : (A) 12 Ω (B) 120 Ω (C) 12 KΩ (D) 120…
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