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The catalytic activity of the transition metals and their compounds is ascribed to

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Important Questions on The d- and f-block Elements

EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 60
The common oxidation states of Ti are
EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 61
The atomic numbers of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are 23, 24, 25, and 26, respectively. Which one of these may be expected to have the highest second ionization enthalpy?
EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 62
(Atomic numbers: Ti=22, Co=27, Cu=29, Ni=28). The colourless species are
EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 63
Titanium shows a magnetic moment of 1.73 B.M. in its compound. What is the oxidation number of Ti in the compound?
EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 64
Of the ions Zn2+, Ni2+ and Cr3+,
(Atomic number of Zn=30, Ni=28 and Cr=24)
EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 65
Which of the following groups contain coloured ions?
1. Cu2+2. Ti4+3. Co2+4. Fe2+
EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 66
Which one of the following pairs of ions have the same electronic configuration?
EASY
JEE Main
IMPORTANT
Chemistry Crash Course JEE Main>Chapter 27 - The d- and f-block Elements>Level 1>Q 67
A compound of a metal ion, Mx+(Z=24), has a spin only magnetic moment of 15 Bohr Magnetons. The number of unpaired electrons in the compound is