Modern ABC Chemistry Class 10. We covered all the Modern ABC Chemistry Class 10 in this post for free so that you can practice well for the exam.
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Modern ABC Objective Chemistry Class 10 Students
A mixture of conc. HCl and HNO3 made in 3 : 1 ratio contains
(A) CO2
(B) NOCI
(C) NCl₂
(D) N₂O4
Option b – NOCl
Chlorine acts as a bleaching agent only in the presence of
(A) Dry air
(B) Moisture
(C) Sunlight
(D) Pure oxygen
Option b – Moisture
The shape of BrF5 can be explained on the basis of hybrid orbitals of type
(A) dsp²
(B) sp³d²
(C) dsp³
(D) sp³d
Option b – sp³d²
Which of the following is used to prepare Cl₂ gas at room temperature from concentrated HCl?
(A) MnO₂
(B) H₂S
(C) KMnO4
(D) Cr₂O3
Option c – KMnO4
Hydrogen bonding is strongest in
(A) O-H…… S
(B) S-H……. O
(C) F-H…… F
(D) F-H…… O
Option c – F-H…… F
Which of the following interhalogens of type AB3 exhibits a dimeric planar structure?
(A) CIF3
(B) ICl3
(C) BrF3
(D) IF3
Option b – ICl3
The type of hybrid orbitals used by iodine atoms? in hypoiodous acid molecules are
(A) sp³
(B) sp²
(C) sp
(D) sp³d
Option a – sp³
Chlorine is mixed with drinking water so that
(A) Bacteria are killed
(B) Dirt is removed
(C) Water is cleaned
(D) Suspension is removed
Option a – Bacteria are killed
When Cl₂ is passed through hot and conc. solution of KOH the following compound is formed
(A) KCI
(B) KCIO3
(C) KCIO2
(D) KCIO4
Option b – KClO3
What products are expected from the disproportion reaction of hypochlorous acid?
(A) HCIO3 and Cl₂O
(B) HCIO₂ and HCIO4
(C) HCl and Cl₂O
(D) HCI and HCIO3
Option d – HCI and HClO3
Which one of the following oxides is expected to exhibit paramagnetic behavior?
(A) CO₂
(B) CIO2
(C) SO2
(D) SiO₂
Option b – ClO2
We covered all the modern abc chemistry class 10 above in this post for free so that you can practice well for the exam.
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