Question : Supersonic jets cause thinning of which layer?

Option 1: O₂ layer

Option 2: O₃ layer

Option 3: CO₂ layer

Option 4: SO₂ layer

Question : Which of the following is not a neutral oxide?

Option 1: N₂O

Option 2: Na₂O

Option 3: NO

Option 4: CO

Question : In Aqua Regia which two acids are mixed in 1:3?

Option 1: HNO₃ and HCl

Option 2: HNO₃ and H₂SO₄

Option 3: HNO₃ and H₂CO₃

Option 4: HCl and H₂CO₃

Question : Which of the following is the formula of barium peroxide?

Option 1: Ba₂O₂

Option 2: BaSO₄

Option 3: BaO

Option 4: BaO₂

Question : In which of the following ions, the colour is not due to d-d transition?

Option 1: [Ti(H₂O)₆]⁺³

Option 2: CoF₆³⁻

Option 3: MnO₄⁻

Option 4: [Cu(NH₃)₄]²⁺