प्रश्न और उत्तर का अभ्यास करें
8प्र: What has a head and a tail but nobody? 1646 05b5cc666e4d2b4197774bec5
5b5cc666e4d2b4197774bec5- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
A Coin has a Head and tail but no body. Since the two sides of coin are called as heads and tails.
प्र: Give the common name for the following compound CH32CH CH2 - Br 1364 05b5cc662e4d2b4197774bec0
5b5cc662e4d2b4197774bec0- 1Isobutyl bromidetrue
- 2Methyl bromidefalse
- 3Propyl bromidefalse
- 4Butyl bromidefalse
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उत्तर : 1. "Isobutyl bromide"
व्याख्या :
Answer: A) Isobutyl bromide Explanation:
प्र: What causes brownian motion in colloids? 1505 05b5cc662e4d2b4197774bebb
5b5cc662e4d2b4197774bebb- 1coagulation of particles and the dispersed phasefalse
- 2erratic flashes of lightfalse
- 3molecules of the dispersion medium colliding with dispersed phase particlestrue
- 4All the abovefalse
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उत्तर : 3. "molecules of the dispersion medium colliding with dispersed phase particles"
व्याख्या :
Answer: C) molecules of the dispersion medium colliding with dispersed phase particles Explanation: When their is a colloid in the solution, then it will show the Brownian movement, such as dust particle in the air will show the Brownian movement. Hence, Brownian movement arises due to the impact of the molecules of the dispersion medium with the colloidal particles. It has been postulated that the impact of the molecules of dispersion medium on the colloidal particles are unequal. This leads to the zig-zag (random) motion of the colloidal particles.
प्र: The concept of carbon credit originated from 1557 05b5cc662e4d2b4197774beb6
5b5cc662e4d2b4197774beb6- 1G-8 Summit, Hciligendammfalse
- 2Earth Summit, Rio de Janeirofalse
- 3Montreal Protocolfalse
- 4Kyoto Protocoltrue
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उत्तर : 4. "Kyoto Protocol"
व्याख्या :
Answer: D) Kyoto Protocol Explanation: The concept of carbon credit for manufacturers originated with the Kyoto Agreement (Protocol) of 1997.
प्र: The term biodiversity refers to 1348 05b5cc662e4d2b4197774beac
5b5cc662e4d2b4197774beac- 1Range of genetic variation within a populationfalse
- 2Total number of different species within a habitatfalse
- 3Both A & Btrue
- 4None of the abovefalse
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उत्तर : 3. "Both A & B"
व्याख्या :
Answer: C) Both A & B Explanation: The term biodiversity refers to the variety of life on Earth at all its levels, from genes to ecosystems, and the ecological and evolutionary processes that sustain it.
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उत्तर :
व्याख्या :
Answer 1) 1/3 x (54 x 150 + 60 x 300 + 36 x 450) = 1/3 x 42300 = 14100. Answer 2) Required ratio of chairs = 64 x 450 + 56 x 50036 x 450 + 44 x 500 = 56800/38200 = 284/191. Answer 3) Required number of chairs = 35 x 12100 x 50000= 3600.
प्र: Find the next number in the following number series? 410, 409, 413, 404, ? 1741 05b5cc662e4d2b4197774bea6
5b5cc662e4d2b4197774bea6- 1412false
- 2415false
- 3418false
- 4420true
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उत्तर : 4. "420"
व्याख्या :
Answer: D) 420 Explanation: The given number series 410, 409, 413, 404, ? , follows a pattern that 410 410 - 13 = 409409 + 22 = 413413 - 33 = 404404 + 42 = 420 Hence, the next number in the given series is 420.
प्र: 4 45 of 259.99 = ? % of 1247.9 1565 05b5cc662e4d2b4197774bea1
5b5cc662e4d2b4197774bea1- 196false
- 2100true
- 378false
- 488false
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उत्तर : 2. "100"
व्याख्या :
Answer: B) 100 Explanation: Given 4 45 of 259.99 = ? % of 1247.9 24/5 x 260 = ? x 1248/100 ? = 1248 x 100/1248 ? = 100.

