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Start learning 50% faster. Sign in nowThe first part of the sentence is in past so “ are” must be replaced with “ were” and should not be confused with the second part as it tells the present situation.
Which of the following metals is the lightest?
What are antibiotics?
The pH value of an acidic solution is:
Which method is employed to separate minor quantities of multiple dissolved solids in a solution?
What is the chemical formula of Urea, the best nitrogenous fertilizer?
Formula of ‘Quick Lime’ is __________
Which of the following is NOT a base?
The term Fire Ice is used for ___?
Which nutrient does soil provide to plants?
Which of the following is the most reactive element in the Periodic table?