Pyramid of energy in a pond ecosystem is always
Options
(a) inverted (b) upright only (c) irregular (d) linear
Correct Answer:
upright only
Explanation:
No explanation available. Be the first to write the […]
The soil particles, particularly clay and organic matter in soil contain negative charges that attract positively charged ions such as
Options
(a) K⁺⁺ (b) Mg⁺ (c) Ca⁺⁺ (d) all of these
Correct Answer: […]
Thurioside is proteninaceous toxin obtained from
Options
(a) Biofertiliser (b) Green manure (c) Bacterial origin (d) Farmyard manure
Correct Answer:
Bacterial origin
Explanation:
No explanation available. Be the first to write the explanation […]
Which of the following has the highest boiling point
Options
(a) n-octane (b) Butane (c) Pentane (d) Ethane
Correct Answer:
n-octane
Explanation:
Among n-octane, butane,pentane,and ethane,the first one contains highest number of ‘C’ […]
When acetylene reacts with arsenic trichloride in the presence of anhydrous aluminium chloride, it produces
Options
(a) Nitrobenzene (b) beta-chlorovinyl dichloroarsinc (c) Lewisite (d) both (beta-chlorovinyl dichloroarsinc) and (Lewisite)
Correct Answer:
both (beta-chlorovinyl […]
Baeyer’s reagent is used in the laboratory for
Options
(a) oxidation process (b) detection of glucose (c) detection of double bond (d) reduction process
Correct Answer:
detection of double bond
Explanation:
Baeyers test is […]
Which of the following substances is used, in laboratory, for fast drying of netural gases
Options
(a) Phosphorus pentoxide (b) Anhydrous calcium chloride (c) Active charcoal (d) Sodium phosphate
Correct Answer:
Anhydrous […]
Oxidation of acetaldehyde with selenium dioxide produces
Options
(a) glyoxal (b) oxalic acid (c) ethanoic acid (d) methanoic acid
Correct Answer:
glyoxal
Explanation:
No explanation available. Be the first to write the explanation […]
pH value of a solution, whose hydronium ion concentration is 6.2 x 10⁻⁹ mol/L is
Options
(a) 7.75 (b) 7.21 (c) 8.21 (d) 6.21
Correct Answer:
8.21
Explanation:
No explanation available. Be the […]
Magnetic quantum number specifies
Options
(a) size of orbitals (b) shape of orbitals (c) nuclear stability (d) orientation of orbitals
Correct Answer:
orientation of orbitals
Explanation:
No explanation available. Be the first to […]
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