Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them unchanged, the value of gravitational force between them will be:
Anonymous Quiz
27%
1/2 times
29%
3 times
34%
4 times
11%
2/4 times
Which of the following is not one a type of cell found in xylem tissues?
Anonymous Quiz
23%
Trachied
39%
Sieve tube
26%
Vessels
12%
Xyleam parenchyma
Which of the following contains maximum number of molecules?
Anonymous Quiz
17%
1g of co2
30%
1g of O2
20%
1g of h2
34%
1g of so4
An element X is divalent and another element Y is tetravalent. The compound formed by these two elements will be:
Anonymous Quiz
24%
Xy
32%
X2y
29%
Xy2
14%
X3y
When a car driver travelling at a speed of 10 m/s applies brakes and brings the car to rest in 20 s, then the retardation will be:
Anonymous Quiz
22%
+0.2m/s
42%
-0.2m/s
22%
+0.5m/s
14%
-0.5m/s
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Which of the following correctly represents the electronic distribution in the Mg atom?
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12%
3,8,1
28%
2,8,1
52%
2,8,2
9%
2,8,3
Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in the discovery of
Anonymous Quiz
23%
Electron
53%
Nucleus in atom
17%
Proton
7%
Nucleus in neutron
👍1
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
Anonymous Quiz
35%
13
41%
10
17%
14
8%
6
How many electrons are present in M-shell of an element with atomic number 20?
Anonymous Quiz
9%
5
63%
8
18%
12
10%
20
Which of the following would weigh the highest?
Anonymous Quiz
18%
2 mol of co2
47%
2 mol of caco3
30%
10 mol of h20
4%
None
Which of the following has maximum number of atoms?
Anonymous Quiz
32%
18 g of co4
31%
18 g of co3
28%
18 g of co2
9%
18 g of co
The relative molecular mass of Na2S2O3.5H2O is
Anonymous Quiz
27%
250 amu
31%
250g
32%
248 amu
10%
248 g