What is the name of the world's first wooden satellite set to be launched by NASA and JAXA?
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Good problem solvers often have which set of the following characteristics?
Gifted students may be asked to spend more time on questions dealing with_____.
What is the role of the National Mission on Foundational Literacy and Numeracy under NEP 2020?
An alkene on treatment with meta chloro perbenzoic acid undergoes epoxidation reaction to give oxirane. What is the correct order of increasing reactivity of the following in the above mentioned epoxidation reaction?
Which of the following are the examples of strong nucleophiles but weak base in protic solvents?
I. CH3S-
II. CH3O-
III. I-
IV. H2O
V. F-
A synthetic polymer which resembles natural rubber is:
The complex [Fe(H2O)5NO]2+ is formed in the ring-test for nitrate ion when freshly prepared FeSO4 solution is added to aqueous solution of followed by the addition of conc. H2SO4. NO exists as NO+ (nitrosyl).
Q. Magnetic moment of Fe in the ring is
The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?
What is the major bromination product in the following reaction?
The substance that gets adsorbed on the surface of the solid is called?
Consider the following pairs
Q. More stable species in each pair is
Which of the following structures represents a chiral compound ?
The pKa of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid is ionized is:
In the following conversion of chromite into soluble chromium salt
4Fe(CrO2)2+ 8Na2CO3 + 7O2 --> 2Fe2O3 + 8Na2CrO4 + 8CO2
There is
Ionisation energy of He+ is 19.6x10-18 J atom -1. The energy of the first stationary state (n = 1)of Li2+ is
A hydrogen like species in fourth orbit has radius 1.5 times that of Bohr's orbit. In neutral state, its valence electron is in
The ionisation isomer of [Cr(H2O)4 CI(NO2)]CI is
When an electron is added to neutral gaseous atom to convert it into a negative ion, the enthalpy change accompanying the process is called:
The pH of an aqueous solution of 1.0 M solution of a weak monoprotic acid which is 1% ionised is:
For moderation of the climate and body temperature of living beings, the responsible factor is:
A __________ overlap doesn’t result in the formation of a bond.