kirsty jones 32251 8151 Edexcel GCSE Chemistry/Science Unit C1: Chemistry in our World Foundation Tier Sample Assessment Material Time: 1 hour You do not need any other materials. Paper Reference 5CH1F/01 Total Marks Instructions Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name, centre number and candidate number. Answer all questions. Answer the questions in the spaces provided – there may be more space than you need. Information The total mark for this paper is 60. The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question. Questions labelled with an asterisk (*) are ones where the quality of your written communication will be …show more content…
. . . . . . . . . . . . . . . . . . . . . . . ............ ............................................................................................................................... . . . . . . . . . . . . . . . . . . . (d) (i) Chlorine can be obtained from seawater by using electricity. What is the name of this process? (1) . . . . . . . . . . . ................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............. ............................................................................................................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............ ............................................................................................................................... . . . . . . . . . . . . . . . . . . . (ii) Explain why you have to ensure there is good ventilation when you prepare chlorine in the laboratory. (2) . . . . . . . . . . . ................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .............
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Say goodbye to the days of food restrictions. Since aligners are removable, you can eat whatever you want, whenever you want. The aligners are easy to clean and are accompanied by a user-friendly cleaning system. No more having to use special tools to clean out those braces!
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Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name, centre number and candidate number. Answer all questions. Answer the questions in the spaces provided – there may be more space than you need. You must not use a dictionary.
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Results: 504 patients (378 females, 126 males) with migrainous chronic daily headache underwent the study. Dramatic, significant, moderate and mild or no improvement constituted 28.6%, 33.3%, 23.8%, and 14.3% of the post treatment courses respectively. Therapeutic effect of intervention on mean pain scores was significant; t=7.38, df=20, p=.000. Two cases developed subcutaneous fat atrophy in frontal injection site and 3 cases experienced syncope during injection.
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Migraine is one of the most common neurological disorders. As per World Health Organization (WHO), headache related complaints were placed in ten top disturbing disease conditions worldwide (1). Incidence of migraine ranges from 3.5% to 7% globally (2). Migraine is said to be due to the enhanced sensitivity level of the nervous system and activation of the trigeminovascular system (3). It was found from the population based studies that approximately two to three percent prevalence of migraine (4). Migraine was found to have strongly associated with age and gender. It was also reported that females aged 40 and above suffer two to three times more than their male counterparts. Around ten percent of the general population was reported to experience migraine (5). Different studies from Pakistan reported incidence of migraine ranges from 14% (6) to 30% (7) population in general, whereas, 34.1% to 41.9% women and 27.9% to 34.0% men suffered from
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