Last seen: Sep 10, 2021
Correct answer: (d) Four Explanation: r.m.s. velocity Vrms = i.e., = = = = ∴ =
Correct answer: (d) 2400 K Explanation: Vrms = Vrms(O2) = Vrms(He) = or = ∴ TO2 = = 2400K
Correct answer: (d) 28.3 Explanation: K = ⇒ nT = 3 x 103 = x 8.314 x 250 + = % Ne = 28.3
Correct answer: (c) 58.33% Explanation: PO2 = x PT After removing 2 mole of O2, P'O2 = x PT Decrease in partial pressure of O2 = x 100 ...
Correct answer: (d) 1.27 × 10–3 mol Explanation: From the ideal gas equation : PV = nRT or n = = = 1.27 x 10–3 mol
Correct answer: (a) 2 Explanation: Given conditions V1 = 16.4 L, V2 = 5 L P1 = 1.5 atm, P2 = 4.1 atm T1 = 273 + 27 = 300 K, T2 = 273 + 227...
Correct answer: (a) CO2 = 300 mL; CO = 400 mL Explanation: CO2 + C → 2CO Stoichoimetry ratio is 1 : 2 AT STP, P = 1 atm, T = 273 K, R = 0.0821...
The conditions necessary for autotrophic nutrition are: (a) Sufficient amounts of carbon dioxide (b) Presence of chlorophyll (c) Sunlight (d) ...
Saliva is secreted by the salivary glands present in the cavity of mouth for: Moistening and softening of food for easy crushing by the teeth. Th...
In our bodies, most of the fat digested in small intestine. Here, fat is first emulsified with the help of bile salts. The emulsification of fat conve...
Haemoglobin is the carrier of oxygen. If the haemoglobin becomes deficient, the cells of our body would not be able to obtain sufficient oxygen for re...
(a) cytoplasm
(d) all of the above
(a) transport of water
Glucose is oxidised either aerobically, i.e. in the presence of oxygen or anaerobically, i.e. in the absence of oxygen to provide energy in various li...
The kidney has an effective mechanism to control the urine production. They can reabsorb water from the glomerulus filtrate when the water level of th...
(i) Plants get rid of the oxygen produced during photosynthesis by its diffusion through stomata and lenticels. (ii) They get rid of excess water by...
The nephron is the basic filtering unit of kidneys. Each kidney has 1-1.5 million nephrons in it. The filtration of blood takes place in Bowman’s ca...
The food is transported in plants both in upward and downward direction through phloem tissues, which consist of sieve tubes and companion cells. The ...