Which of the following is the main component of Portland cement (besides lime)?

Name the method of asexual reproduction in fungi.

In which interval is the function $f(x) = 2x^2 - \ln |x|, (x \neq 0)$ monotonically decreasing?

Acidity of diprotic acids in aqueous solutions increases in the order

$A$ simple pendulum is executing simple harmonic motion with a time period $T$. If the length of the pendulum is increased by $21\%$,the percentage increase in the time period of the pendulum of increased length is ..... $\%$

Silica is added to roasted copper ore during smelting in order to remove