The functional group present in methanol is ………
A) Alcohol
B) Aldehyde
C) Acid
D) Ketone
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In \( III ^{ rd } \) group of salt analysis for cations \( NH _{4} Cl \) and \( NH _{4} OH \) are added as group reagents. Which of the following can be used instead of \( NH _{4} Cl \) ? (a) \( NaCl \) (b) \( \left( NH _{4}\right)_{2} SO _{4} \) (c) \( \left( NH _{4}\right)_{2} C _{2} O _{4} \) (d) \( NH _{4} NO _{3} \)
d) NH4NO3 As it provides NH+4 ions which suppresses the ionisation of NH4OH so that only the group 3rd cations are precipitated as hydroxides because of their low solubility products and NO−3 ions...
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A produces B by α- emission. If B is in the group 16 of periodic table, what is the group of A ?
\(_Z^AA \overset{\propto-Emission}\longrightarrow\) \(_{Z-2}^{A-4}B\) + \(_2^4He\) When α-emission occurs, atomic number decreases by 2 and atomic mass number by 4. Thus, If ‘B’ belongs to group 16 of periodic table, that means outermost orbit will contain 6...
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Match the following: Group – A Group – B 1. Megacity a) Population between 1 million -10 million
C) 1- b, 2 – c, 3 – a
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Match the following: Group – A Group – B 1. Rajiv Gandhi International Airport
D) 1 – c, 2 – b, 3 – a
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Nitrogen is the element of group-VA of the periodic table. Which of the following is the atomic number of the next element in the group?
Correct option is C) 15
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valence of group IA — i) 4 , valence of group IVA — ii) 0
D) a → iii, b → i, c → iv, d → ii
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Group — Valency I group — i) +2 ,II group — ii) -1
B) a → iii, b → i, c → iv, d → ii
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The functional group which is recognised as alcohol is
Correct option is B) —OH
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Match the following. Group – A 1) ‘O’ group 2) AB’ group
Group – A Group – B 1) ‘O’ group D) Universal donors 2) AB’ group A) Universal recipients 3) Myeline sheath B) Axon 4) Land Steiner E) Blood groups 5) Granulocytes C) Eosinophils
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State the trends in the following properties of group 1 and group 2 elements down a group.
Sr. no. Property Down a group i Atomic radii Increases ii Ionic radii Increases iii Ionization enthalpy Decreases iv Electronegativity Decreases v Standard reduction potential Decreases
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