F.W. Went used these plants in his experiments
A) Agar – Agar
B) Oats
C) Wheat
D) Pea
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Dinesh went from place A to place B and from there to place C. A is 7.5 km from B and B is 12.7 km from C. Ayub went from place A to place D and from
Correct Answer - अयूब ने ज्यादा दूरी तय की। यह दूरी 0.9 km या 900 m ज्यादा थी।
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Coffee powder and KMNO4 experiments are done to prove
Correct option is D) Diffusion
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You are doing experiments on diffusion in your lab. Find the substance which turns into pink colour when added to water.
C) Potassium permanganate
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Nowadays these plants are grown as ornamental plants.
B) xerophytes
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The “Influence substance” in the plants discovered by F.W. Went
Answer is (D) Auxin
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Vidhya and Vijay were studying the effect of certain radiations on flower plants. Vidhya exposed her plants to UV rays and Vijay exposed his plants
Frequency of UV rays is greater than infrared rays, hence UV rays are much more energetic than infrared rays. Plants cannot tolerate the exposure of high energy rays. As a...
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Which of the following is not the reason for choosing of pea plant by Mendel for his experiments ?
(D) Not suitable for crossing
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Why did Mendel select pea plants for his experiments ?
Answer is (D) B and C
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In order to ensure that he had pure-breeding plants for his experiments, Mendel:
(B) let each variety self fertilise for several – generations
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1. (a) Is ammonia more dense or less dense than air? (b) What property of ammonia is demonstrated by the Fountain Experiment? (c) Write the balanced equation for the reaction between ammonia and sulphuric acid. 2. Pick the odd member from the list giving reasons: (a) Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide. (b) Copper oxide, aluminium oxide, sodium oxide, magnesium oxide. 3. Give reasons for the following : (a) Liquid ammonia is used as a refrigerant in ice plants. (b) Aqueous solution of ammonia is used for removing grease stains from woollen clothes. (c) Aqueous solution of ammonia gives a pungent smell. (d) Aqueous solution of ammonia conducts electricity.
(1) (a) ammonia is less dense than air (b) solubility in water (c) 2NH3 + H2SO4 → (NH4)2SO4 (2) (a) Ammonia → because - NH3 is basic while, SO2,HCl and CO2 are acidic oxides. (b) CuO,...
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