MCQ
Which element forms hydride?
- ✓$\text{Cr}$
- B$\text{Mo}$
- C$\text{W}$
- D$\text{Sg}$
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$2s$ $2{p_x}$ $2{p_y}$ $2{p_z}$

$(A)$ Ice floats in water.
$(B)$ Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions.
$(C)$ Formic acid is more acidic than acetic acid.
$(D)$ Dimerisation of acetic acid in benzene.