Which of the following has the highest boiling point?
Anonymous Quiz
65%
H₂O
9%
H₂S
5%
H₂Se
21%
H₂Te
Which of the following solutions will have the lowest freezing point?
(A)
(B) (C) (D)
(A)
(B) (C) (D)
Anonymous Quiz
10%
0.1 M NaCl
23%
0.1 M glucose
56%
0.1 M CaCl₂
11%
0.1 M urea
Which organelle is known as the "powerhouse of the cell"?
Anonymous Quiz
1%
Nucleus
97%
Mitochondria
2%
Ribosome
0%
Golgi apparatus
What is the basic unit of a protein?
Anonymous Quiz
7%
Nucleotide
5%
Monosaccharide
88%
Amino acid
1%
Fatty acid
Which type of RNA carries the genetic code from the DNA to the ribosome?
Anonymous Quiz
14%
rRNA
36%
tRNA
49%
mRNA
1%
snRNA
The fluid mosaic model describes the structure of:
Anonymous Quiz
8%
Cell wall
85%
Plasma membrane
5%
Cytoplasm
1%
Nucleus
Which of the following is an example of a polysaccharide?
Anonymous Quiz
12%
Glucose
10%
Fructose
71%
Starch
7%
Maltose
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Which of the following is a SI unit of pressure?
Anonymous Quiz
25%
Atmosphere (atm)
68%
Pascal (Pa)
3%
Torr
4%
Bar
The value of the gas constant (R) in SI units is:
Anonymous Quiz
31%
0.0821 L atm/mol K
63%
8.314 J/mol K
3%
1.987 cal/mol K
3%
22.4 L/mol
Which law states that "at constant temperature, the volume of a gas is inversely proportional to its pressure"?
Anonymous Quiz
73%
Boyle's law
18%
Charles' law
4%
Avogadro's law
4%
Gay-Lussac's law
Which of the following has the highest pH?
Anonymous Quiz
23%
Lemon juice
13%
Pure water
47%
Milk of magnesia
17%
Vinegar
Which of the following gases is monatomic?
Anonymous Quiz
4%
Oxygen
4%
Nitrogen
89%
Helium
3%
Carbon dioxide
The second trophic level in a lake is :
Anonymous Quiz
10%
Phytoplankton
81%
Zooplankton
5%
Benthos
4%
Fishes
What is the percentage of PAR used by the plant for photosynthesis?
Anonymous Quiz
4%
100%
20%
50%
20%
1-2%
56%
2-10%
An example of ex situ conservation is :
Anonymous Quiz
17%
Wild life Sanctuary
8%
Sacred Grove
15%
National Park
60%
Seed Bank
Total amount of living substances present in different levels of a chain is showed as:
Anonymous Quiz
20%
Standing state
60%
Standing crop
6%
Standing state or crop
14%
All of the above
The lanthanide contraction is responsible for the fact that
Anonymous Quiz
9%
Zr and Y have about the same radius
6%
Zr and Nb have similar oxidation state
83%
Zr and Hf have about the same radius
2%
Zr and Zn have the same oxidation state