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A ball of mass $0.15 \text{ kg}$ is dropped from a height $10 \text{ m}$, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is ($g = 10 \text{ m/s}^2$) nearly
A particular station of All India Radio, New Delhi broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light $c = 3.0 \times 10^8 \text{ ms}^{-1}$]
The incorrect statement among the following is :
A uniform conducting wire of length $12a$ and resistance '$R$' is wound up as a current carrying coil in the shape of, (i) an equilateral triangle of side '$a$'. (ii) a square of side '$a$'. The magnetic dipole moments of the coil in each case respectively are
Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as:
Which of the following reactions is the metal displacement reaction? Choose the right option.
Statement I : Acid strength increases in the order given as $HF << HCl << HBr << HI$. Statement II : As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strength increases. In the light of the above statements, choose the correct answer from the options given below.
The following solutions were prepared by dissolving 10 g of glucose ($C_6H_{12}O_6$) in 250 ml of water ($P_1$), 10 g of urea ($CH_4N_2O$) in 250 ml of water ($P_2$) and 10 g of sucrose ($C_{12}H_{22}O_{11}$) in 250 ml of water ($P_3$). The right option for the decreasing order of osmotic pressure of these solutions is :
Given below are two statements : Statement I : Aspirin and Paracetamol belong to the class of narcotic analgesics. Statement II : Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.
The correct structure of 2, 6-Dimethyl-dec-4-ene is
$CH_3CH_2COO^- Na^+ \xrightarrow[\text{Heat}]{\text{NaOH, ?}} CH_3CH_3 + Na_2CO_3$. Consider the above reaction and identify the missing reagent/chemical.
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :
Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures :
Amensalism can be represented as:
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is :
Gemmae are present in
Which of the following stages of meiosis involves division of centromere?
Match List-I with List-II. List-I: (a) 2SO_2(g) + O_2(g) -> 2SO_3(g) (b) HOCl(g) --hv--> OH + Cl (c) CaCO_3 + H_2SO_4 -> CaSO_4 + H_2O + CO_2 (d) NO_2(g) --hv--> NO(g) + O(g) List-II: (i) Acid rain (ii) Smog (iii) Ozone depletion (iv) Tropospheric pollution
Match List-I with List-II. List-I: (a) Benzene ring with CO, HCl, Anhyd. AlCl3/CuCl, (b) R-CO-CH3 + NaOX, (c) R-CH2-OH + R'COOH, Conc. H2SO4, (d) R-CH2COOH, (i) X2/Red P, (ii) H2O. List-II: (i) Hell-Volhard-Zelinsky reaction, (ii) Gattermann-Koch reaction, (iii) Haloform reaction, (iv) Esterification.
Which of the following statements is false for the properties of electromagnetic waves?