Leave is a lateral outgrowth of stem developed _____ at the _____.
Anonymous Quiz
17%
Endogenously, Node
13%
Endogenously, Internode
58%
Exogenously, Node
11%
Exogenously, Internode
Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is :
Anonymous Quiz
12%
B>C>Si>N>F
17%
Si>C>B>N>F
45%
F>N>C>B>Si
26%
F>N>C>Si>B
Considering the elements F, Cl, O and N, the correct order of their chemical reactivity in terms of oxidizing property is :
Anonymous Quiz
29%
(a) F>Cl>O>N
41%
(b)F>O>Cl>N
24%
(c) Cl>F>O>N
7%
(d)O>F>N> Cl
Two stars each of one solar mass (= 2×10^30 kg) are approaching each other for a head on collision. When they are a distance 10^9 km, their speeds are negligible. What is the speed with which they collide ? The radius of each star is 10^4 km.
Anonymous Quiz
17%
2.6 * 10^6 m/s
32%
2.6 * 10^7 m/s
43%
2.6 * 10^8 m/s
7%
2.6 * 10^9 m/s
A spaceship is stationed on Mars. How much energy must be expended on the spaceship to launch it out of the solar system ? M(space ship)= 1000 kg; M(sun)= 2×10^30 kg; M(mars) = 6.4×10^23 kg; Radius(Mars) = 3395 km; Radius (orbit of mars)= 2.28 ×10^8 km.
Anonymous Quiz
18%
6 * 10^10
43%
6 * 10^11
31%
6 * 10^12
8%
6 * 10^13
Which of the following have stipulate leaves?
Anonymous Quiz
31%
Fabaceae
14%
Solanaceae
14%
Liliaceae
42%
Both (2) and (3)
Alternate phyllotaxy is found in
Anonymous Quiz
24%
Solanaceae
15%
Liliaceae
18%
Fabaceae
43%
All of these
The elements Z = 117 and 120 have not yet been discovered. In which family / group would you place these elements.
Anonymous Quiz
6%
15,1
16%
16,2
23%
17,1
55%
17,2
Element number 101 is ______. The name was proposed by ______.
Anonymous Quiz
52%
Mendelevium, Mendeleev
30%
Mendelevium, Seaborg
10%
Seaborgium, Mendeleev
7%
Seaborgium, Seaborg
Aayush D MAMC
Aerial velocity for a planet is
Please remember this. It has been asked multiple times in JEE and PMTs.
There is no atmosphere no moon because
Anonymous Quiz
9%
Of Chemical Environment of Moon
8%
Of Biological Environment of Moon
83%
Escape velocity of Moon is 2.3 km/s which is lesser than RMS of gas molecules formed on the surface.
Which of the following family has characteristically single seeded fruits?
Anonymous Quiz
32%
Fabaceae
23%
Solanaceae
27%
Liliaceae
19%
None of these
2 + 2 arrangement of Calyx is found in
Anonymous Quiz
17%
Fabaceae
25%
Solanaceae
14%
Liliaceae
43%
Brassicaceae
In Nobel Gases, the highest and lowest value of Electron Gain enthalpy(positive) is shown by
Anonymous Quiz
17%
Rn, He
15%
Rn, Ne
41%
He, Rn
26%
Ne, He