प्रथम पंक्ति के संक्रमण तत्वों (Sc से Zn तक) में आमतौर पर कौन सा गुण निरंतर बढ़ते हुए रुझान को दर्शाता है?

The correct decreasing order of basic character of the given transition metal monoxides is:

In which of the following pairs do both elements NOT have the (n-1)d10ns2 electronic configuration?

In the following pairs, the one in which both transition metal ions are colourless is: