Inhaling the smoke from a burning _____ could _____ you quickly.

The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, then the value of x is :

Pipes P and Q can fill a storage tank full of water in 10 and 6 minutes, respectively. Pipe R draws the water out from the storage tank at a rate of 34 litres per minute. P, Q and R operate at a constant rate. If it takes one hour to completely empty a full storage tank with all the pipes operating simultaneously, what is the capacity of the storage tank (in litres) ? 

Choose the grammatically correct sentence?

Choose the correct form to complete the sentence: “By the time the engineer arrived, the robotic arm _____ its assigned operation”?

If (A=\begin{bmatrix}1&2\3&4\end{bmatrix}), what is (\det(A))?

If (A) is a (3\times3) matrix with (\det(A)=5), what is (\det(2A))?

If (A) is nonsingular, which statement about (A^{-1}) is correct?

In Gaussian elimination, the main purpose of partial pivoting is to?

A system Ax = b has a unique solution when A is square and?

The fundamental structural unit of a silicate mineral is:

The mineral exhibiting a hardness of 7 on the Mohs scale is:

The dominant chemical composition of hematite is:

The characteristic streak colour of hematite is:

The mineral having perfect basal cleavage and a hardness of approximately 1 is:

The chemical formula of magnetite is:

The most abundant mineral group in the Earth's crust is:

The mineral exhibiting strong effervescence with dilute hydrochloric acid is:

The crystallographic system of halite is:

The principal ore mineral of aluminium is:

The chemical composition of galena is:

The mineral commonly exhibiting conchoidal fracture is:

The diagnostic physical property of magnetite is:

The predominant ore mineral of zinc is:

The mineral having the chemical formula FeS2 is:

The mineral with a hardness of 9 on the Mohs scale is:

The chemical formula of cassiterite is:

The principal ore mineral of mercury is:

The silicate mineral classified as an isolated tetrahedral silicate is:

The cleavage angle characteristic of amphibole minerals is approximately:

The characteristic cleavage angles of pyroxene minerals are approximately:

The mineral group characterized by sheet silicate structures is:

The chemical formula of fluorite is:

The mineral exhibiting three directions of perfect cleavage not at right angles is:

The typical specific gravity of native gold is approximately:

The silicate mineral possessing a framework structure is:

The chemical formula of chalcopyrite is:

The mineral classified as an oxide of titanium is:

The most appropriate distinguishing property of streak is:

The mineral showing a hardness of 2 on the Mohs scale is:

The igneous rock formed by slow cooling of magma at considerable depth is:

The extrusive equivalent of granite is:

The intrusive equivalent of basalt is:

The texture resulting from exceptionally rapid cooling of molten rock is:

The igneous rock generally containing more than 90% mafic minerals is classified as:

The volcanic rock containing abundant vesicles and commonly having very low bulk density is:

The dominant minerals in granite are:

The igneous rock characterized by large crystals embedded in a finer-grained groundmass exhibits:

The igneous rock composed predominantly of calcium-rich plagioclase and pyroxene is:

The sequence of crystallization of common silicate minerals from cooling magma is explained by: