laboratory ammonia

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FIRST TERM HOLIDAY PROJECT FOR SS3
BLOCK LAYING
1.Draw floor plan of two bedroom flat and show the front elevation.
PHYSICS
1(a). An object is placed in front of a concave mirror whose radius of curvature is
12cm. If the magnification of the image produced is 1.5, how far is the object
from the mirror.
(b). The reflection of a narrow beam of light incident normally on a plane mirror,
falls on a metre ruled placed parallel to the mirror at a distance of 1.0m. Calculate
the angle of rotation of the reflected beams is displayed 21.26cm along the
metre rule when the mirror is rotated.
ENGLISH LANGUAGE
Write an article of 450 words suitable for publication in a national newspaper on
the benefits that will be derived from the government showing interest in
agricultural.
TECHNICAL DRAWING
Specifications for a building is given below. Use them to draw a structure from
blinding to the wall plate across one section wall.
Foundation – Blinding 100mm
Strip foundation 1000mm GL
Footing 675 X 225mm
Block wall 225mm
Floor level 150mm from ground level
Hardcore 150mm
Screed 20mm
2.Window Casement Window iron
1200 x 1200mm
Window sill 1000 from ground level
3. Lentel 225 x225mm
4. Ceiling 3200mm from floor level
Noggings 50 x50 cardboard
Ceiling sheet
5.Roof – Wall plate 100 x 100mm
Pitch 30 , Rafters 100x 50.
Purlins 50 x50mm at 600mm centres
Eaves projection 750mm
Facia 225 x25mm
Gable end, 450mm
Strulfs 75mm x 50mm at 1000mm centres.
CIVIC EDUCATON
1. Give reasons why the practice of constitutional democracy is relevant in our
society.
NOTE: All these should be done in your notebook.
GOVERNMENT
1. Discuss military rule in Nigeria:
i. from 1966-1975
ii. from 1975-1979
iii. from 1983-1985
iv. from 1985-1993
v. from 1993-1999
Emphasis should be on:
i. definition
ii. features
iii. causes of military take over
iv. consequences
v. structures etc.
NOTE :Project work should be done in your note book.
CHEMISTRY
1a. Read nitrogen and its compounds and answer the following questions .
i. show by diagram only the laboratory preparation of nitrogen from atmospheric
air.
ii. Draw a well labeled diagram for the laboratory preparation of a dry sample of
ammonia. Write an equation for the reaction.
Bi. Name two drying agents that can be used to dry ammonia gas in the
laboratory.
ii. Explain why concentrated H2SO4 cannot be used to dry ammonia gas.
Ci. State 2 physical properties of ammonia.
ii. write a balanced equation for the reaction between ammonia and
[a] oxygen [b] copper [ii] oxide
2. In the industrial production of ammonia.
[a] what name is given to the process?
[b]state one source of each of the starting materials.
[c] what are the operating temperature and pressure?
3.a give 3 uses of aqueous ammonia
B[i] name two reagents for the laboratory preparation of trioxonitrate(v)acid
B[ii ]why is all glass apparatus used in the laboratory preparation of
trioxonitrate(v)acid ?
c. write an equation in each case to show the behaviour of HNO3 as: (i) an acid (ii)
an oxidizing agent
(d) mention two uses of HNO3.
MATHEMATICS
1a. find the value of
i. 323/5
ii.
0.043/2
b. find the value of 2√𝑎 denominator B, when
a=1.21x10-4 and b= 4.4x10-6,giving your answer in the form Ax10n where A is a
number between 1 and 10 and n is a whole number.
[c] find the range of values of x for which 13≥3x-23 where all the numbers are in
base four. Give the result in base four.
2a. if
2x−3y
3x−2y
=4 evaluate
x2+y2
2xy
.
b. if t=√𝑥 − 𝑦,express x in terms of y and t.
c. a tricycle has sides of length [x-y]cm, [x+y]cm nd 2√𝑥𝑦cm find out whether the
tricycle is right-angled.
3. A sales man receives a basic salary of ₦750000 a year together with a
commission of 6% of the value of goods sold and a car allowance of ₦45 per km.
a. find the total amount he receives in a year in which he sells goods worth ₦9375
and travels 10000km.
b. the next year he travels 12000km and receives a total of ₦2010000. Calculate
the percentage increase in the value of goods sold.
4. for what values of x is the fraction
I.hot defined
ii. zero?
X+13X−48
7+2X
𝑡
𝑠
b. given that c=n[ + ]
𝑘 25
i.make s the subject of the formula
ii. find the value of s when c=6, n=8,t=1 and k=18.
5. A blue dice and red dice are rolled simultaneously. A two-digit number is
formed by noting the outcomes:the blue dice giving the units digits eg 3 on the
blue dice and 5 on the red dice give the two digits number 35.
a. make a table showing all the possible outcomes
b. what is the probability of obtaining a two two-digit number whichis
i. greater than 30
ii. exactly divisible by 11.
iii. prime?
C. what is the probability of obtaining a two-digit number that is either a perfect
square or exactly divisible by 7?.
COMMERCE
Write five (5) reasons for the existence of the wholesaler despite the fact that
manufacturer deal directly with consumers and retailers
ECONOMICS
1. Define National income
2. Explain methods of National income calculation
3. Explain the usefulness of National income computation
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